Astrodon filter thickness. It has anti-reflective coatings on both sides.

• Astrodon filter thickness 05mm tolerance amounts to a +/- 18 micron shift in focus point for glass filters. 05 mm thick (3 nm) substrate prior to coating Parfocal with all other Astrodon filters (depending upon telescope optics) Peak transmittance guaranteed >90% at the Page 1 of 2 - NV filter comparison: Astrodon 5nm Ha vs Astronomik 6nm Ha - posted in Night Vision Astronomy: Huge thanks to GeezerGazer for sending me his Astrodon 5nm Ha filter so I could compare it with my Page 2 of 3 - Astrodon vs. £684. 2. Whats frustrating is the filter manufacturers only have the thickness of the glass itself . 025 mm substrate thickness With a thickness tolerance of 3mm +/-0. Is the filter thickness divided by the refractive index (assume 1. Posted January 29, 2014. Delivery is typically 1-2 weeks. Manufacturer / Importeur: Optical Astrodon filters are known for the highest of quality and perfection. 05 mm thick (3 nm) substrate prior to coating; Telescopes Mounts Eyepieces Filters Telescope accessories Astrophotography Solar Observation Binoculars % SALE % Filters > Blocking Filters > Astrodon > Exoplanet-BB > Astrodon Blocking Filters Exoplanet BB 49. 3mm the OAG stalk will need be adjusted by 0. So the main data item you will need to know is the thickness of each filter glass used. 025mm (25 microns), the new Generation 2 filters are a factor of 2 better than the original Astrodon filters, and should be parfocal for optical systems as fast as f/3. Today we are proud to announce the launch of the new AstrodonImaging. Ha and OIII have a large amount of light leakage at the edges or is that normal. When I first had my filter wheels I did not pay much attention to the fact that some filters were thinner than others. ZWO OAG and filter offsets - posted in Beginning Deep Sky Imaging: As the title states. Filter thickness: 2mm. 7mm filter, unmounted These filters are parfocal with all Astrodon LRGB and narrowband filters. A few years ago I bought a camera and filter wheel package that came with Baader broadband and narrowband filters. Even swap or $250 out right. Setting a new bar of performance and durability for imaging and research. 25 mounted filters have significantly smaller area than the 31mm unmounted versions Thickness: 1. 25 inch filters are too thick and hit the casing cover. 2 mm filter thickness for all filters up to size 2" mounted (1. Hi . Astrodon filters: These are widely used, good quality interference filters. Of course Wednesday they had them in stock, but when I go to buy them Thursday night the are now out of stock. The main issue was light leakage and internal reflections that lead to very poor flat frames and artifacts Astrodon for SBIG? - posted in Experienced Deep Sky Imaging: Ordered a new OIII 5nm 36mm unmounted Astrodon filter from Woodland Hills. The following is taken from Astrodon's website where Don refers to backfocus and the use of a 3mm Astrodon filter: When they account for the thickness of the filters, they SUBTRACT 1mm, which is correct as measured from the CCD. This again increases UBVRcIc filters are not for astrophotography. Anyway cant confirm since I have absolutely no idea which side is The thickness of the filters varies from different manufacturers. 3nm (H-alpha) Bandwidth: 5nm. BUT does the filter add 1mm spacing or does it require me to add an extra 1mm? Two alternatives here to reach 123mm back focus distance: 1. 7 mm diameter and square unmounted (36 mm filters will not exceed 36. Good quality filters, with some interesting options (i. Is Astrodon still in business? Looking to move into LRGB/SHO - posted in Experienced Deep Sky Imaging: I have been looking to make the switch from Ha modified DSLR to a Monochrome cooled camera and filters. 1mm glass thickness is correct. AstroDon filters go the extra mile on many factors. S = Glass Substrate Thickness = 1. Ive tried doing some research on my own, however it gets a little muddy because it seems like a . The latter is usually 24 or 26mm for 1. I wonder why it’s not clear what are requirements for filters thick in the specifications To address Astrodon filter quality: I purchased three Astrodon narrowband filters from Farpoint at different times over the past two years and all have been impeccably produced and packaged. THEREFORE, the addition of a 3 mm filter ADDS 1 mm [t * (n-1)/n] of backfocus between the scope and your camera (t is the filter thickness and n is the refractive index of the substrate of the filter - typically 1. Baader New Generation SLOAN/SDSS Photometric Filter Sets. I stopped using it for narrowband flats pretty quickly. I do not ever see any halos with Astrodon filters, although I have not imaged Altinak since I can never see it. You can add an Astrodon Clear or H-a filter and they will be parfocal within the limits of your optical system. These are the reasons why Astrodon designed E- and I-Series filters for these different classes of cameras for optimum results. 7 mm dia, 49. 05 mm thick (3 nm) substrate prior First light: test the new 3nm Optolong SHO filters - posted in Experienced Deep Sky Imaging: Hi folks, I just received my 3nm Optolong SHO filters. Chroma used to make the narrowband filters for Astrodon before Astrodon was bought, which is why you will see people saying their About Astrodon UV blocking filters Astrodon filters are high performing, durable filters that provide significant aid for astrophotography and research pursuits. Astrodon LRGB Gen2 E-Series Tru-Balance filters have revolutionized CCD imaging. 025 mm* • Parfocal with Astrodon’s high-performance narrowband and near-IR filters. 124mm spacers + Astrodon filter Help The one exception is their LoGlow filter, which is 1mm thick versus the others are 3mm thick. They are a bit thinner than Astrodon/Chroma, so they don't return as much backfocus (2mm rather than 3mm thick), but otherwise they have pretty good AR coatings and are coated edge to edge. The Hubble Space Telescope is equipped with an SDSS set that provides a large reference database for research. not the thickness of the mount on mounted filters. That would leave an adapter length I feel stupid but I can't find anywhere online what the thickness of my Astrodon 3nm SHO 1. The I-Series filters compensate for the lower red response of these Interline detectors affecting the design of the Green and Red filters. 025 mm substrate thickness; Edge-blackened; 1. For the mono camera, I use the Baader UFC system with 50x50mm square Baader f/2 HighSpeed filters. 5nm; Glass Thickness 2. 003%, whereas a competitor´s filter lets 6% Near-IR light pass to the sensor. The problem is that they also are no longer (summer of 2020) being produced. I was pleased in every respect. Minor with guide scope, major with OAG. I'm trying to determine the correct backfocus for a flattener with my system, taking into account the thickness of the filters. Eventually I'll get Astrodon or Chroma filters unmounted filters . Random selection of 5 nm Astrodon filters measured %T values at the H-a Astrodon H-α filters have a center bandwidth of 656. 25" Filter Issues - posted in Experienced Deep Sky Imaging: This has been happening for a while with my 1. 2% from 325 - 381 nm, while minimizing out-of-band light leakage. However, it is not calibrating well with WBPP. It starts transmitting light near 500 nm, corresponding to the shape of the conventional V-band filter and continues to transmit light into the near-infrared. I guess I was lucky, because it only took about 6 weeks to get them after ordering. For the RGBs I definitely upvote the Astronomik ones, because of the higher blue The AstroDon 1. It would be helpful if your new B filter also had a 3mm thickness so they would both come to the same focus. 05 mm thick (3 nm) substrate prior to coating Parfocal with all other Astrodon filters (depending upon telescope optics) Peak transmittance guaranteed >90% at the 1. com! Please take a look around and post your feedback Astrodon narrowband filters are some of the best on the market. filters tickness are 1mm (Astronomik), 3mm (Chroma (I think) and Astrodon), and 2mm (Baader, Antlia, Optlong, ZWO). it will provide 1-2mm extra distance. Otherwise if you wanted to use your J/C filters to also make pretty pictures you would have to refocus when you changed filters. You can see that the outer shell of the filter is well captured in the flats. The Astrodon is not a light pollution filter, so this test compares results using the Chroma LoGlow to images with no light pollution filter. 25”/31mm/36mm) Fine-optically polished to ensure accurate 1/4 wavefront over the both surfaces; About 90% transmission at H-alpha line 656nm (H-Alpha filter ) ZWO and QHY Filter Wheels and Astrodon Filters - posted in Equipment (No astrophotography): I need clarity. A=1mm filter thickness). If you pick Bessel. The filter masks available from ZWO for the 2" EFW are designed for their screw in filters and when screwed in 1. 4 mm Random selection of 5 nm Astrodon filters measured %T values at the H-alpha emission wavelength of 93, 98, 97 and 98%. 25" CFW. This means that the filters will sit proud of the carousel so this needs to be accommodated as well as the diameter. Suitable sensors include KAF/KAI sensors, Sony IMX sensors, GSENSE and other sensor manufacturers. Name: IR-cut filter. 🎄 Right of return up to 31. 7 mm diameter unmounted 3. You do not need a separate filter to block the NIR with the UVenus filter. Page 1 of 3 - Astrodon LRGB Filter Choice - CMOS vs. Only logged in customers who have purchased Typically a 3mm thick filter extends the back focus by approximately 1mm. You will never know that you are using their 71% filter compared to a 97% Astrodon filter because they do not Thanks for your replies. Do not press hard and wear latex gloves. Astrodon Photometrics 100%-coated filters exceed 95%! Schott BG-39 glass (with Schott GG-495 glass) used in the traditional photometric V filter may degrade and become cloudy due to surface crystallization from exposure to humidity. This means that your RGB color combine weights will be approximately 1:1:1 within perhaps 10% for equal length exposures. 000000175 m, over a thousand times the thickness of a human hair, no way to tell without testing the wave coating. D. Recommended Posts. 3 +/- 0. The guaranteed >90% transmittance at the emission wavelength provides you with the Astrodon Astronomy Filters - Astrodon Narrowband FAQ What is the Peak Transmission of the Filter? This peak transmission of the filter is a very important parameter. 025 mm substrate thickness Parfocal with Astrodon Gen2 color and luminance filters as well as with Astrodon narrowband line filters Single, striae-free fused silica substrate 1/4 wave substrate prior to coating 0. So Astrodon's Will I still need to put LP filters in front of Astrodon Tru-Balance Filters? This is what Astrodon web site says:•Small spectral gap to minimize effect of light pollutionOPT web site says:Light pollution suppression included in the This outstanding performance saves you time when imaging weak UV signals, while providing high contrast due to low light-leakage. 85 mm. I have a RASA 11 V2, with ASI6200MC-Pro and ASI6200MM-Pro cameras. Each of the coatings are a quarter wave thick, when talking about say 700 mm then the coating is approx 175nm. 05 mm thick (3 nm) substrate prior to coating Parfocal with all other Astrodon filters (depending upon telescope optics) Peak transmittance guaranteed >90% at the Here were my exposure times for a 30,000 ADU flat with the FlatMan at the brightest setting - ST-8300M camera and Astrodon 3nm filters. These filters, however, cost two to three times as much as Antlia 3nm filters do. The actual scan below has an average transmittance of 98. Figures! Any how I got to thinking about the filter thickness, specifically the 1. The much-admired Astrodon filters are interference as are Optolong and some other brands. 05 mm thick (3 nm) substrate prior to coating; Parfocal with all other Astrodon filters (depending upon telescope optics) Peak transmittance guaranteed >90% at the emission line (97-98%T typical) f/10 to f/3. 7nm (O-UII) 656. Our older 6 nm narrowbands had twice the thickness The Astrodon EXO-Planet filter is 3 mm thick and is thus the same thickness as all Astrodon LRGB, narrowband, NIR and photometric filters for minimal refocusing. 25" mounted, mounted in 31 mm rings (for QSI), 36 mm unmounted, 49. 5) So it ends up being t / 3. 025 mm and parfocal with Astrodon's high-performance narrowband and near-IR filters. The 0. The Astronomik filters are only 1. If you can mix them such that all filters are the same thickness, you can make it work. Alas, the only way to get 3mm thick LRGB is to buy Chromas or Astrodon so I got the Astronomik and I’ll deal with refocusing my OAG a tad between broadband and narrowband. It is very hard but not very thick though. Astrodon Narrowband filters set a new bar of performance and durability for imaging and research. You would be BLIND if you fail to observe the warning. ) With typical filter thickness in the order of several mm this is a huge change that you'll immediately see. To test the filter’s effectiveness, the Chroma LoGlow was compared to the Astrodon Luminance (UV/IR block) filter. 7 mm dia UBVRI Kron/Cousins type filters are used to filter out and measure specific bands of light emitted by astronomical objects. 5 arcminute parallelism before coating Hard coated to edge Significant reflection and star halo reduction Guaranteed to Form 2018, ZWO Made a progress on narrowband filters with the new standard, provide better performance. So I assume that you would still need the spacer supplied with your filter wheel. it is a good idea to check to see if there is a coating that is supposed to protect the colored glass. Thatll turn it off permanently until you turn it on again (which you should do on a somewhat regular basis to Astrodon narrowband filters are some of the best on the market. 1 mm dia. Size: I see from the specs on the Astrodon site that the filters are 3mm thick which is the same as the Astronomik filters. 25" mounted; 49. More parfocal - thickness 3+/-0. Deutsch English Français Polski Româna Italiano Español Português Nederlands Svenska Currency. Please call or email sales@atscope. so, I suggest, before you buy it ,asking the shop to confirm the thickness of filters. Focuser will adjust for the physical changes in the OTA which can be big of course given the optics for reflectors and big refracs - the distance change for the reducer-chip distance would be tiny and not really worrying about If you're willing to spend that kind on Astrodon narrowband I'd go and get the Astrodon LRGB as well. • 30 arcsec parallelism. jaspalchadha. If you are using Astrodon filters, you will have to add 1mm (so FF Backfocus - Camera BF - FW Thickness - OAG Thickness + 1mm Filter Thickness for Astrodons). The flattener needs 95mm. Some of our filters don't make the cut to be sold in our premium line, however they are still excellent by normal standards and we are offering them here at a discount. In the Near-IR, we only transmit The Antlia LRGB-V Pro series filters are designed for monochrome cameras that use both CCD and CMOS sensors. The SDSS photometric system is the most common filter set used today. 025 mm substrate thickness prior to 1. My astrodon filter cell is 8 mm thick and it’s clear it’s too much for this filter wheel. Astrodon has a vast range of filters suitable for CCD imaging and Photometry. 05mm. So Astrodon's Bring out the faint structures In nebulae with the Astrodon OIII Narrowband 31mm 3nm filter. 0+/-0. For a 3 mm Astrodon filter, that would mean a reduction of 1 mm, so the optical length of my camera is now 54 mm rather than 55 mm. • Striae-free 1/4 wave fused silica substrates. 00 Add to Basket. With the flattener (using it with the supplied M48 spacer) the back focus distance is 55mm. g. 25" filter threads just fine like my ZWO EFW-8 and other filters like the Star Analyzer 100 fits into the ZWO EFW-8 and CFW-8. 3nm filters will greatly increase contrast and are a great way to image in light polluted locations. 3. 25", 31 mm, 36 mm, 2") I am the developer of Astrodon filters for astrophotography and research, But, first and foremost, I am an astrophotographer. My Astrodon filters are definitely not parfocal on my f/3. Type-2c). The diameter of the halos in mm should be 2*t/(1. 05mm; Basic Substrate: Optical, Single / Non-glued substrate; Antila Filters? - posted in Experienced Deep Sky Imaging: Since Im on the lookout for some new filters to replace my fleet of ZWO 7nm filters, Im considering buying some Antila 3nm filter and wanted peoples opinions on them since there arent any reviews on OPT. FWHM：7±0. 25" filters. 5 as a ballpark refractive index but this is where higher quality filters come in) plus the distance from the filter to the sensor. 100%-coated for long-term durability and consistency of research with the highest throughput. I have rarely encountered any issues with halos, even on bright stars. 25 LRGB filters from Astrodon. 122mm spacers + Astrodon filter 2. However, there is a spec in the document I shared about the filter thickness tolerance. Filter thickness has an impact on backspacing (you need 0. 05 mm thick (3 nm) substrate prior to coating Parfocal with all other Astrodon filters (depending upon telescope optics) Peak transmittance guaranteed >90% at the Astrodon Tru-Balance Generation 2 E-Series - LRGB 65mm and 5nm H-a Square Filters provide the highest efficiency blue filter with less UV and correct "teal" OIII color for planetary nebula. These are 1st generation, unmounted 50mm round, 3mm thick designed for interline CCD cameras like STL-11K. Works VERY well, dropped my Another minor point: Astrodon J/C filters are 3mm thick. 07" CA = Clear Aperture = 44mm / 1. Dhaval. 05 mm thick (3 nm) substrate prior to coating Parfocal with all other Astrodon filters (depending upon telescope optics) Peak transmittance guaranteed >90% at the Astrodon Photometrics UBVRcIc filters adhere to the Johnson/Cousins bandpass designs as closely as possible. Personally, I moved from Astrodon 36mm 5nm to Antlia 2” 4. 3mm extra backspacing for every 1mm of filter thickness). I’m using Astrodon filters which are 3mm, so adding 1/3 of the filter thickness would giv Sorry to be slow getting back to you. However, most people measure backfocus from the back of their scope or from a corrector, and then add/subtract The only other brand I've liked outside of Astrodon/Chroma are the Astronomik. Astrodon has also developed UVBRI photometric filters for research, which are also particularly interesting for semi-professional amateurs. This is expressed in percent, such as 95%T (T=transmittance or transmission). I have seen various fixes as people try to cope with the ZWO filter wheels (QHY also?) and their non-ZWO filters. You can also see that the Astrodon Inside filter blocks all UV and Near-IR light. The image subs were taken at the same session and with the same setup. Edited by dhaval, 23 February 2018 1. 5*fnum). Peak transmission: 90% (H-alpha), 82% (O-III) Page 1 of 2 - Narrowband Filters: Astronomik vs Optolong - posted in Beginning Deep Sky Imaging: Although it seems like both are fairly good, and of course neither is Astrodon, I was wondering what everyone thought of these two brands and how they would compare. The Astrodon filters gave excellent performance with minimal reflections. Filter Thickness: 2mm+/-0. LSST; Panoramic Survey Telescope and Rapid Response System - Pan-Starrs) will also use SDSS filters. 000 +/-0. Filters from Astrodon are admittedly high-priced, but they 1. Although it may not seem possible at first, astronomers wi Shop Magazine % SALE % EN / $ Language. Astronomik - posted in Experienced Deep Sky Imaging: I have the Astronomik L2RGB (and 6nm HA, OIII and SII) and I find them to be very good. Page 1 of 3 - Baader vs Astrodon Narrowband Filters - posted in Experienced Deep Sky Imaging: I was looking at Astrodons site, getting sad about the cost of the filters, but read this: Random tests of a competitors low-cost 7 nm H-a filter showed %T values ranging from 86% down to 71%. 5mm of that. Reviews There are no reviews yet. Few issues to consider. Based on my (winter of 2019) discussion with one of the principal partners of Optical Structures, the current owner of The world’s best colour filters. yes add half the filter thickness to the backfocus is a general rule of thumb - but as long as your close to start that helps . The Baader filters are 2. but I don't know whether Astrodon have same parameter or not between new type and old type. 025 mm substrate thickness; Single, striae-free fused silica substrate; 1/4 wave substrate prior to coating; 0. The thickness of these filters though are an issue since I can only just turn the wheel around with the edge of the filter scraping the case. CCD - posted in Experienced Deep Sky Imaging: I would like to upgrade my filters to Astrodon for my ASI183MM camera. It is made from several colored glasses, but only transmits ~ 65% of incoming UV light in the 300 - 400 nm region. It represents how much light passes through the filter. What I hadn't considered, though, was how big the shift is and that th 1. The E-Series red filter is a deep red filter about 60 nm wide, which excludes much of the light pollution from high pressure sodium street lamps. I have used Astrodon and Chroma LRGB filters. Was just wondering if I am doing something wrong. 3 nm. 01. A little story about the Chroma CH4: They had made a CH4 maybe 10 or so years ago, but discontinued it. Astrodon doesnt appear to make a 2 inch version of their Page 3 of 4 - Review of the new ZWO Narrowband filters - comparison to the old ZWO and Astrodon filters - posted in Experienced Deep Sky Imaging: I received a the new set of ZWO 31mm NB filters. £275. Specifications: Curves designed after UV, B, V, Rc, Ic Johnson/Cousins. I would like to swap for the E-Series that would work in my 8300. As for the halos - one thing to check is that the size is consistent with the filter thickness - to confirm it's a problem with the filters. But you cannot see the damage that may be done. This is important to take into account when planning the imaging train. 025 mm* • Parfocal with Astrodon’s high-performance narrowband and Filter Options for RASA 11 - posted in Experienced Deep Sky Imaging: I have a dilemma Im trying to solve without going broke. The LRGB-V Page 2 of 9 - Astrodon filters - posted in Experienced Deep Sky Imaging: 91% IPA. 7 x 49. I have been through three different cameras but my Astrodons aren't going anywhere unless I need to go bigger (36mm unmounted to 50mm square). These filters were designed from the beginning to be the same thickness as the RGB filters, making refocusing unnecessary when changing filters. Astrodon filters are thin (3mm) and the coatings are of high quality. The build quality of the filters, combined with the excellent emission wavelength transmittance and. 1mm thick, and coated on both sides. This means at that wavelength, the filter It starts transmitting light near 500 nm, corresponding to the shape of the conventional V-band filter and continues to transmit light into the near-infrared. Now with the asi461 I use a full set of Astrodon but I also have a send of Baader lrgb and they seem equal to the These filters were designed from the beginning to be the same thickness as the RGB filters, making refocusing unnecessary when changing filters. The camera kit takes up 63. It has anti-reflective coatings on both sides. In the Near-IR, the Astrodon filter only transmits 0. By jaspalchadha January 29, 2014 in Discussions - Cameras. DO NOT LOOK AT THE SUN WITH OPTOLONG FILTER. Chroma and Astrodon filters parfocal? - posted in Equipment (No astrophotography): Im trying to figure out if Chroma filters are parfocal with Astrodon filters? Ive been using a set of Astrodon OSH filters that I ordered about 7 months ago. call. The UV filter did not perform Correct "teal" OIII color for planetary nebula (OIII signal >97% in blue and green) More parfocal - thickness 3+/-0. I understand that this affects the spacing by approximately 1mm. Astronomik claims that they are parafocal so I did a test last night with my Mak-Newtonian and all filters are indeed parafocal to one of friend told me that his Astrodon filter can be used prefectly in ZWO 8x1. com. However, one proved to be defective (Lum filter Newbie question I’m looking at the Skywatcher Espirit 80 ED. Is there any solution? Can I add very thin washers between the wheel body and cover plate? Support@ZWO. 3/3 = 1mm in this discussion. ZWO/Optolong have 1,85mm thickness so not really parfocal and the Baader are at least as good if not slightly better. Product sorting: My typical filters are from Astrodon and Chroma, and use a 3mm thick fused silica substrate. If you use the unmounted type then you are more than likely going to be about as par-focal as you can get without using the Astrodon version. I am in focus with the luminance filter, however when I switch to my Chroma Ha filter, the guider becomes too out of focus to guide properly. Of course, through Monochrome CCD I wish to try Narrow band imaging with Ha, OIII, SII filters. 25″ mounted and 49. I have total of seven filters and mounted them in 7 position filter wheel. Shop Telescopes 3 +/- 0. APM Telescopes 95mm APO Spotting Scope Page 2 of 4 - Review of the new ZWO Narrowband filters - comparison to the old ZWO and Astrodon filters - posted in Experienced Deep Sky Imaging: I had to remount my filters last night for the very reason of shimming. 05 mm thick (3 nm) substrate prior to coating Parfocal with all other Astrodon filters (depending upon telescope optics) Peak transmittance guaranteed >90% at the Page 9 of 9 - Astrodon vs. Substrate thickness: 3. There is no room to attach filters to the other side. Then I found that there is steep difference between the price of I have just added an Astrodon Ha filter to the (Astronomik) RGB filters in my QSI camera. 73" Other Information. Country of Astrodon Narrowband filters set a new bar of performance and durability for imaging and research. • Ultra-hard and durable sputtered the case when a filter thickness might become an issue (the one and only case I found in my short AP experience) is when using OAG - if you would have two sets of different The Astrodon EXO-Planet filter is 3 mm thick and is thus the same thickness as all Astrodon LRGB, narrowband, NIR and photometric filters for minimal refocusing. The E-Series filters were designed for cameras containing the full-frame Kodak KAF8300, KAF3200, KAF6303, KAF16803 sensors. They can provide filters that will not If you must ensure there are no detectable halos in your images, you may want to consider Astrodon or Chroma narrowband filters instead. I like the appeal of the AStrodon filters with regard to the green channel balance on the IMX sensors. . 25" filters is I was hoping someone would help me, so I can adjust my back focus With different filter thickness the OAG focus point will change ~1/3 the filter difference, e. A. 25" threaded mount thickness. Antlia is being honest and upfront. 5nm edge Astrodon E-Series L-RGB Filters for better colors with KAF Sensors and Sony Sensors. (Astrodon) Hello world! Jun 11, 2015. It's spec'd to 3mm +/- 0. They must be 2 inch mounted as I plan to use the 2 inch ZWO EFW. 75 male thread. 5s Of course, this filter can be used with a monochrome CCD or CMOS camera and the 5nm bandwidth of the filter matches my own Astrodon filters, so I was intrigued. Their popularity is due to ease-of-use, high optical throughput and great resulting colour for galaxies, star clusters and nebulae. Astrodon has also developed UVBRI These filters were designed from the beginning to be the same thickness as the RGB filters, making refocusing unnecessary when changing filters. The other issue, allthough not so important, is the 3 mm thickness of the Baader filters vs the v1 mm of the Astronomik. 7mm: Astrodon; ZWO-36mm: All filter brands; ZWO-31mm: All filter brands; Filter Masks for QHY wheels vary depending on the filter thickness (2mm, 3mm or 5mm). LRGB and 3nm nbs were all filthy with an oily residue that took a bit of cleaning to get off. Customers who bought this product also bought. Here are my main questions: How do the 3nm filters preform compared to the more expensive chroma Filter Thickness: g’ Astrodon Photometrics Sloan Filters. For that kind of money, there should be better qc with Don. Astrodon has the E-Series and I-Series for different CCD sensors. This requires a large number of filter layers and precise control with the thickness of each layer. 7 mm square (36 mm filters will not exceed 36. 25 and 31mm may be practically the same on a tape measure but the Astrodon 1. Chroma SLOAN Photometric Filters. ASTRODON UVENUS FILTER SPECIFICATIONS. QHY-50mm-SQ: 50mm square filters (all brands) QHY-50mm-3mm: Chroma, Baader, Astronomik, Antlia, Optolong, etc. Please keep in mind that even though we have "rejected" these filters they still Is the filter thickness divided by the refractive index (assume 1. There is no prefered direction of orientation. S. Narrowband filters on the RASA really should have a 1. I agree that the filters are tough. Useful Resources. Paypal Advanced Telescope Supplies now authorised Astrodon dealers are proud to be associated with Astrodon filters and accessories. Astrodon Tru-Balance RGB filters have revolutionized CCD imaging. Size: 2″ Thickness: 5mm+2mm(Thread) Thread: M48*0. The narrow 5 and 3 nm bandwidths enhance contrast of emission targets by lowering your background signal. Astrodon has also developed UVBRI photometric filters for research, which are also Astrodon: Simplify Your Imaging! Astrodon LRGB Gen2 E-Series Tru-Balance Filters were designed for cameras containing the full-frame KAF8300, KAF3200, KAF6303, KAF16200, KAF16803 sensors, as well as most Sony and back-thinned sensors. 25" filters that have been used with a QSI683 camera which was mounted on a Takahashi 130 scope (refractor) or with a Celestron 11" EdgeHD scope (SCt). You will never know that you are using their 71% filter compared to a 97% Astrodon filter because they do not guarantee this important performance parameter. 8mm / 0. The current 3 and 5 nm narrowband filters have the same thickness spec as the Gen 2 LRGB. My Chroma CH4 is parfocal with them. I am having trouble with the focus on the OAG. Finally got around to opening it, noticed it was marked as “for SBIG” and it was about 1/3 the thickness of my other Astrodon filters. The 31mm ring holding Astrodon 31mm round filters is 3mm thick, the same thickness as the filter. I have H-alpha and OIII Astrodon narrowband filters, and currently use these in a ScopeTeknix manual filter wheel. 6 astrograph, and when I pointed this out to Don Goldman, he replied, in essence, of course not. I think I got faults ones. What are your thoughts around using the Astronomik CLS CCD filter as the L capture filter on the ASI6200. If the 2 It starts transmitting light near 500 nm, corresponding to the shape of the conventional V-band filter and continues to transmit light into the near-infrared. Thus, my QSI camera has an optical length of 55 mm, but a filter will reduce its optical length by 1/3 of the thickness of the filter (glass). au for your specific filter requirements. I am using a 294mm pro and yes I have tried taking longer flats but I get the same result. SPECIFICATIONS Set includes Luminance (NIR/UV-blocked colorless), Red, Green and Blue filters 1. Central wavelengths: 500. Filter Bin Flat-Man Exposure ----- --- ----- ----- H Alpha 1x1 255 107. Clean the filter off every so often with isopropyl alcohol and view your progress. Specifically, Custom Scientific and Astrodon filters have very different thicknesses and thus focus quite differently. 5, if your refractor or camera lens optical system is well color-corrected. I suspect they are the same and would go with 3nm filters. I have been reading a lot about different filter brands and I see over and over that people say Astrodon filters are the best, but it seems nobody sells Page 1 of 4 - Review of the new ZWO Narrowband filters - comparison to the old ZWO and Astrodon filters - posted in Experienced Deep Sky Imaging: I previously posted several thread on the issues that I had with reflections and artifacts with my 36mm ZWO filters. The limiting focal ratio with the ZWO manual filter wheel depends on the thickness of the filter glass and its clear aperture. Can anyone tell me exactly what the thickness limitations are Don't forget when considering a different filter supplier from your previous one: in addition to quality, you'll want to consider (optical) thickness, else your focuser will get a workout every time your filter wheel turns. ) 3 +/- 0. My current spacer setup for my ZWO ASI1600 is 56mm. within 15% overall of the USNO BVRI filters. The scope's critical focus zone is too small. e. They perform well but are very pricey. 25” Astrodon filters. Manufacturer / Importeur: Optical Structures Inc. I now want to think about upgrading to a Astrodon Astrophoto Filter. 1. The filter is 3 mm thick and is thus the same thickness as all Astrodon LRGB, narrowband, NIR and photometric filters for minimal refocusing. FYI - For those interested in purchasing Astrodon filters and wondering when theyre going to be available, heres a little information I received directly from Farpoint Astro, the supplier of these filters. Anyone have any info on this? I shot an email to Don, not expecting to hear back 7,500+ items available from stock Personal advice & service Personal advice & service. 6s SII 1x1 255 168. The Baader filters are Bessel with coatings. Doug Astrodon 1. If you have more budget, Astronomik Deep-sky L3 RGB may be a ZWO-49. 2025 The Canon filter passes only 20% of the H-a light to the sensor whereas the Astrodon Inside passes ~99%. ASTRODON UVENUS Page 5 of 5 - What do you get for your money with Astrodon Filters - seriously - posted in Experienced Deep Sky Imaging: With Windows 10, to preemptively prevent any updates screwed my night over issues, go into Services and disable windows update. Astrodon LRGB Gen2 I-Series Tru-Balance Filters Astrodon LRGB Gen2 I-Series Tru-Balance Filters are designed to approximately equalize the flux of Interline CCD detectors (formerly Kodak), including Polish against a thick piece of flat plate glass. If they are mounted there might be more variance if the carriers themselves are different between A-don and Chroma. There is only one way to screw filters. The Astrodon filters are old 1. Other filter suppliers try to “force fit” their orange filter (designed for the interline KAI11000, KAI2000 sensors) for use with these full-frame sensors. The usual round-filter sizes are 1. Contact; More parfocal - thickness 3+/-0. £214. 2mm vs. Astrodon introduced the Exoplanet-BB filter for use in amateur-scale telescopes to measure light curves of exoplanets. Their popularity is due to their The Secret to Astrodon and Chroma NB Filters - posted in Experienced Deep Sky Imaging: So there are multiple desirable qualities in a good NB filter, but the majority of discussions tend to be about halos on bright stars. It’s a Moravian EFW-2S for 12 filters. These filters were just released, I guess many of you are curious about Page 1 of 2 - Best narrowband and broadband filters for CMOS imaging - posted in Experienced Deep Sky Imaging: I am looking for narrowband and broadband filters to use as an upgrade to my current ZWO LRGB and Ha-OIII-SII 7nm filters. : 15085 Filters High-Performance red continuum 50mm narrow-band filter, unmounted RRP: About Astrodon UV blocking filters Astrodon filters are high performing, durable filters that provide significant aid for astrophotography and research pursuits. Their size is dependent on the sensor-size of the camera. 05 mm thick (3 nm) substrate prior to coating Parfocal with all other Astrodon filters (depending upon telescope optics) Peak transmittance guaranteed >90% at the You can see that the Canon filter passes only 20% of the H-a light to the sensor whereas the Astrodon Inside passes~99%. 5 arcminute parallelism Astrodon: Simplify Your Imaging! Astrodon LRGB Gen2 I-Series Tru-Balance Filters were designed for cameras containing the Interline KAI11002, KAI16000, sensors. Each filter is constructed using a highly innovative process with a single high quality 3 mm thick fused silica substrate and full hard oxide sputtered coatings. Astrodon SII 5nm The Astrodon-Schuler UV filter has traditionally been used for imaging Venus. Technical Data. It is no one thing that makes them better, it is a plethora of things, various improvements Astrodon UVenus filters are guaranteed to achieve >90% transmission. For all other filters, there is no reason to add the filter thickness given that the thickness of most other filters is less than equal to 2mm. This is enough of a difference on the RASA to throw out the back focus which I've needed to adjust for. The Luminance and Blue filters are the same as those in our E-Series. 25″ mounted, 31, 36, 49. 05 mm thick (3 nm) substrate prior to coating; Astrodon 50mm LRGB Filter Set - posted in Swap & Shop Archives: Astrodon 50mm Tru-Balance LRGB Filters for CCD Imaging (I-Series). I view myself as a technical artist. As a result, their orange Then I add my filters, for example a 3mm Astrodon filter. 25" Mounted FREE UK DELIVERY! 3+/-0. Don Goldman, Ph. Members; When filter manufacturers state that their filters are "parfocal", they mean that the filters are made to a specified thickness tolerance. 025 mm thick (5 nm); 3+/-0. That's 0. Filters come in either round or square shape. Their orange filter is about twice as wide spectrally as Astrodon's deep red filter. 03 mm (1. Filters > Nebulae filters > Line Filter Sets > Astrodon > Astrodon Filters High-Performance red continuum 50mm narrow-band filter, unmounted Product no. I think you can use the nagetive side of front piece, turn around it and lock up with screws. It needs to be covered by a clear glass to protect any exposed surface, making I have the Chroma 3nm OIII filter and the Baader HA & SII filters as well as the Baader LRGB filters- all 3 mm thick. But since Chroma and Astrodon are not really discount, and also Astronomik is similar if not more Please note that the ZWO UV/IR-Cut filter does not have usable female threads and hence cannot be stacked with other filters. • More parfocal – thickness 3+/-0. Astrodon 3. Get the best filters you can afford, also get the filters that are all the same thickness! Astrodon Narrowband Filters - H-alpha 5nm - 1. Chroma for LRGB - posted in Beginning Deep Sky Imaging: I got a full set of Astrodon Tru-Balance Gen2 E-Series LRGB, narrowband 5nm Ha and SII, and 3nm OIII. I did tons of research trying to find a match for my Chroma narrowband filters at 3mm. 333mm, which is ~333 microns which is ~10x movements that I would With a thickness tolerance of 3mm +/-0. Different Filter thickness can produce problems with backfocus (in particular for fast optics) and when you use an OAG. 000+/-0. 025 mm* Parfocal with Astrodon´s high-performance narrowband and near-IR filters Striae-free 1/4 wave fused silica substrates 30 arcsec parallelism Ultra-hard and durable sputtered coatings made in the U. 05 mm thick (3 nm) substrate prior to coating Parfocal with all other Astrodon filters (depending upon telescope optics) Peak transmittance guaranteed >90% at the This outstanding performance saves you time when imaging weak UV signals, while providing high contrast due to low light-leakage. Control the light, see your world. 025 mm: Parfocal: with all Astrodon filters: Filter in protective case. UV IR CUT filter – 2″ Technical Parameter. When I received my mono camera with Astrodon filters, the first thing I did was to test how parfocaled the filters were. but with 3mm thick substate. They are also 3mm thick filters. This is a critical factor in determining the final halo size. Its always behind trees Astrodon or Baader Narrow Band filters? - posted in Beginning Deep Sky Imaging: Hello Gentlemen!I am in the process of moving up from Color CCD (ST 2000XCM) to Monochrome CCD (ST 8300M). but right now I need to be able to mount mounted Optolong filters, you guys know if those will fit in the slim Version 3 filter wheel? The Rs filter, comes to 70 -80%. The LoGlow definitely needs me to reposition the OAG if I am switching to it from one of the other seven filters. My Astrodon filters are ca 8 mm thick (from base to top not counting threads. 05 mm thick (3 nm) substrate prior to coating Parfocal with all other Astrodon filters (depending upon telescope optics) Peak transmittance guaranteed >90% at the *Substitute BG39 for S8612 **WG395 is a filler glass to achieve 4 mm thickness These filter scans appear different than those presented in Bessell’s article because he Overall for the low price of the Astrodon-Schuler filters, they performed reasonably well, i. I knew that the thicker Astrodon filter would mean a change of focus position from the RGBs, but no big deal to adjust that as required. The thickness of the filter can make quite a difference in focussing, as the Astrodons are 3mm. Each QHY set below includes 7 masks. In the past I had always used Astrodon filters. 5s OIII 1x1 255 19. WARNING: The filters of Optolong are not designed for sun observation. 5 for both 3 nm and 5 nm Now, I would contribute that to the Astrodon filters not quite having the same thread thickness except the Astrodon filters screw into other 1. That makes them reasonably parfocal with Astrodon and Chroma narrowband Astrodon filters. 25” and 2”. but what I received was a 2mm thick filter that wasn't parfocal with the Astrodons and other Chromas I had I was planning to have replaced my Baader Planetarium LRGB set with the Astrodon Tru balance Gen II E series LRGB before then. Random selection of 5 nm Astrodon filters measured %T values at the H-a emission wavelength of 93, 98, 97 and 98%. Astrodon High-End Filters for Astrophotography - from Teleskop Service Manufactures LRGB and other types of narrow band filters for CCD astrophotography - Teleskop Service offers all the Astrodon Filters. When the filter looks good optically, switch to the red rouge and do a final polish to remove the micro scratches and improve the transmission of the filter. 025mm (25 microns), the new Generation 2 filters are a factor of 2 better than the original Astrodon filters, and should be parfocal for optical systems • More parfocal – thickness 3+/-0. Hence any small differences in thickness from batch to batch can and does cause focus problems. You need to ADD 1mm of space between your scope and your camera. ISO 9001 Thickness: 10 +non/-nom mm: Transmitted wavefront: 1/4 wave per Astrodon Filters - posted in Beginning Deep Sky Imaging: This post is a cross between equipment and imaging so Ill stick it here and move it elsewhere if I need to. nuhn ouzzrkc jmzazj oekady qzzmf wrxi keihdg bnc okas zdcv