I research what I could find. I am not sure who you were responding to here. The surface of the SII and Ha was highly reflective. document.getElementById("copyright_year").innerHTML = new Date().getFullYear(); H- (hydrogen-alpha) at 656 nm (nanometers) is deep red in color and the most popular narrowband filter. With a filter that's spectrally narrower, however, the difficult part is maintaining a constant signal (% transmission at the emission line). This can never be perfect, but it does allow you to take one exposure time for all of your RGB data and therefore, only just one corresponding dark exposure time. 1.25 Round Mounted (HA3_27R) I was afraid that the un-blackened edges of the LRGB filters may lead to reflections so I decided to use the filter masks that came for the ZWO filters to install the Astrodon filters. I am highly indebted and grateful for all the help, advice and commiseration from my friends here at Cloudy Nights. If you are not, then my apologies. Manufacturer's warranty period, if known. The narrow 5 and 3 nm bandwidths enhance contrast of emission targets by lowering your background signal. You can go look on Astrobin, or the hundreds of threads here where people have make it 100% clear that Baader, Astronomik, ZWO, and Optolong filters are far inferior. Our team of product advisors know what its like to buy astronomy equipment for the first time. Astrodon Narrowband filters are renowned for minimizing halos around bright stars, even for long exposures of 30-45 minutes typical of narrowband imaging in astrophotography. For me I worked very hard to solve these issue and am just posting the results so that others might make a better choice than I did. Here are screen captures for the master flat frames for each filter: STF stretched masterflat (40 flats with 50 dark flats) showing the histogram for the Astrodon E-series LUM filter, STF stretched masterflat (40 flats with 50 dark flats) showing the histogram for the Astrodon E-series RED filter, STF stretched masterflat (40 flats with 50 dark flats) showing the histogram for the Astrodon E-series GREEN filter, STF stretched masterflat (40 flats with 50 dark flats) showing the histogram for the Astrodon E-series BLUE filter, STF stretched masterflat (40 flats with 50 dark flats) showing the histogram for the Astrodon 5nn OIII filter, STF stretched masterflat (40 flats with 50 dark flats) showing the histogram for the Astrodon 5nn Ha filter, STF stretched masterflat (40 flats with 50 dark flats) showing the histogram for the Astrodon 5nn SII filter. For the best experience on our site, be sure to turn on Javascript in your browser. As a result, their orange filter tends to "wash out" HII regions in galaxies and detail in nebula. Our recent blueshift data show that Astrodon 3 and 5 nm filters can be used with nearly all systems as fast as f/3.5 with virtually no loss in emission signal, so you do not need to buy custom upshifted filters if you have both fast and slow systems. No matter whether they are for observing or for astrophotography, filters are very important accessories. And again thanks to everyone who has contributed to this set of post. The Astrodon 3nm H-alpha Filter is deep red in color and the most popular narrowband filter. But now that I know what to do, I might not do it so quickly. All coupons, tax, shipping, store credit and gift cards will be applied during checkout. The did a simple stretch using the setting from the screen transfer function. AstrodonNarrowbandfilters currently are provided off-the-shelf for: When we refer to bandwidth, we are referring to the spectral width of the transmission region at 50% of the peak transmittance (FWHM full width at half maximum). Here are the comparisons. I think that this is a great example of how this community can work together to help us all out. I stretch the Astrodon data significantly more and could not see any halo on Sigma Orionus. The narrow 5 and 3 nm bandwidths enhance contrast of emission targets by lowering your background signal. The filters were quite clean except for the dust. I would say that the Astrodon filters are clearly superior, but whether they are worth 3X the price is up to you. Premium grade H-alpha interline chip CCD-filter for fast optical systems f/10 to f/2.8IR-blockedNO halos, NO reflections, NO ghostingNon-aging sealed coating edgesBaader's new H-Alpha passfilter enables high-contrast deep sky images of H-II regions (such H-alpha filters are essential for imaging nebulae and other objects which are rich in ionized hydrogen. This is the 36mm Astrodon Ha filter fully installed and mounted in the ZWO EFW using the ZWO filter mask. TheI-Seriesfilters compensate for the lower red response of these Interline detectors affecting the design of the Green and Red filters. I hope to have it done tonight. Astrodon-Narrowband-Filters_FAQ.pdf (1.21 MB), Telescope Cases, Covers & Dobsonian Shrouds, Skip to the beginning of the images gallery, Guaranteed 90%+ maximum transmission for the highest achievable performance, >OD 4 (0.01% transmission) out-of-band blocking, Clear 1/4 wave substrates feature hard-oxide coatings to the edge, removing light leakage from uncoated rims, Parfocal with all other filters made by Astrodon, Astrodon 3 nm SII Narrowband Filter - 36 mm Round. Just for point of reference, I went through exactly the same dilema with respect to the Astrodon filters and the price. With the Baader (OIII in particular) it was a processing nightmare cleaning it all up. Our latest narrowband filters are typically achieving >95-98% transmittance. If you're looking for other sporting optics or weapons scopes, please visit our partner site. The ZWO filter masks do overlap some at the edges so that they do not sit flat onto the filter wheel. The product has to be in stock for the price match to be applied. 524/2013 on Alternative and Online Dispute Resolution (ADR / ODR), online retailers are obliged to place an , Astrodon 36mm Narrowband Filter H-Alpha 5nm unmounted. Lastly, Astrodon Narrowband filters are coated to the edge of the part and are edge blackened. Nous serons ferms la semaine prochaine, du lundi 1er aot au mercredi 3 aot, pour linventaire annuel. Vous pouvez aussi venir visiter notre boutique du Vieux-Longueuil afin dtre conseill en personne par lun de nos spcialistes. I will post a link to this thread at the end of the long one. Nous continuons de prendre vos commandes en ligne. For lack of a better term, the LRGB sleeves were a bit like wax paper - not that they were wax paper, but I think the sleeve for the narrow band filters are much better. This may not be the best test, but I wanted to get to the data and had to make a choice. Omg. This is critical to minimize stray light for a filter that blocks most light except for the narrow bandpass. Si vous avez besoin de la traduction dune description de produit, communiquez avec nous pour que nous vous la produisions en priorit. This is the RED filter surface as received. Filters designed for use Atik Narrowband Filter Kit- H-alpha, OIII, SII, Baader 3.5/4nm f/2 Ultra-Highspeed Filter Set - CMOS-Optimized H-alpha/O-III/S-II, Baader 3.5nm / 4nm Narrowband Filter Set - CMOS-Optimized H-alpha/O-III/S-II, Baader 4nm Ultra-Narrowband OIII Filter - CMOS-Optimized, Baader 6.5nm f/2 Highspeed Filter Set - CMOS-Optimized H-alpha/O-III/S-II, Baader 6.5nm H-alpha Filter - CMOS-Optimized, Baader 6.5nm Narrowband Filter Set - CMOS-Optimized H-alpha/O-III/S-II, Baader 6.5nm OIII Filter - CMOS-Optimized. Contrast brings out faint features by reducing the background the narrower the filter, the better. You are of course welcome to use those, its your gear, but they are not needed. (Certain exceptions). However, with a combined astronomy experience of over 115 years (117 to be exact), our team of telescope and astrophotography experts, a.k.a. This shows the GREEN (slot 3) and BLUE (slot 4) filters in place in the ZWO EFW. I do see that you liked the posts so I am not sure if your comments were directed at me or not. However, for now, there is no evidence of any likely issue due to the reflections from the Astrodon filters. Durable hard-oxide sputtered coatings with a 5-year limited warranty against delamination Our recent blueshift data show that Astrodon 3 and 5 nm filters can be used with nearly all systems as fast as f/3.5 with virtually no loss in emission signal, so you do not need to buy custom upshifted filters if you have both fast and slow systems. Several functions may not work. For the flats, I used a Alnitak Flatman EM panel with two layers of tee shirt fabric as a diffuser with the panel out put set at 200. What do we mean by this? In the case that this article currently is not available from the warehouse, please note the following: we order from this supplier in regular intervals. We accept the following forms of payment: Visa, MasterCard, Discover, American Express, Direct Wire Transfer, Money Orders & Checks. This comparison should not be what you make a purchasing decision based on. To me, they appear to be better from this point of view than my ZWO filters with the best masks that I could make. I know his material is not marketing crap. This is critical to minimize stray light for a filter that blocks most light except for the narrow bandpass. Contrast brings out faint features by reducing the background the narrower the filter, the better. Bare with me as I will take me some time to get all the data posted. I know there is now a perfect test, but given my available time and resources it was the best that I could do. Prices are subject to change without prior notice, 2022 Astronomy Plus | Serving Astronomers since 1988, Free delivery in Canada for order over 500$! Without a non-linear stretch, there was no visible feature at all to any of the master flat frames. Comments and question are very welcome. Please take this a just data to help others. Astrodon Narrowband filters for imaging are all about contrast. You can see the increase in contrast in the sequence of equal-exposure images of the Crescent Nebula (NGC 6888) taken on the same system and on the same night. If you are not, then my apologies. These are very close together spectrally. At the end of the day, I was able to generate data that was basically clean enough to eliminate any filter-induced artifacts in my final images. The optical system that I used for this test was: I also creates simple LRGB channel combinations for each filter set: My opinion of the data is that the Astrodon filters are clearly superior with respect to star halos. Also the data was taken at different times so there is some differences in collections conditions. Like the H-Alpha filter, the SII filter also has a deep red color close to 672 nm. The Alnitak region is notorious for halo "spoiling" images of the horsehead and flame nebula from the O-class supergiant star Zeta-Orionus. I assume you did not bother to read the thread he posted? As the bandwidth becomes narrower, the nebula pops out of the background, as does the faint surrounding nebulosity. I used SGP flats calibration wizard to set the exposure. The OIII filter was less so, but still highly reflective. Since the previous thread was so long and I think that this comparison will be welcome, I am posting it in its own thread so that it is not buried in the other thread. I use 50mm round Astrodon LRGB + HA filters in my 16200 and can confirm that no filter mask will be necessary. Here is the data for the narrow band filters: Astrodon first then the ZWO. Im thinking about putting together a new mono setup and spending a massive amount of cash on Astrodon filters will be my biggest dilemma when the time comes. All the filters were nicely labled on the edge. You only have to send us a link of the item/offer and we will match any price we confirm as valid. The ZWO data seems to be more stretched, especially for the LRGB data. Sent from my iPhone using Tapatalk. There is a clear difference between what you get in terms of your data with Astrodon filters and other brands. Sent from my iPhone using Tapatalk, Mount: ORION HDX-110 EQ-G using EQMOD/CdC - Side-by-side, OTA:ORION EON 115mm APO with JMI motorized focuser/PCFC2, Camera: ZWO ASI1600MM-C with a Williams Optics Flattener IV - 660mm FL. You still have to decide what your money is worth and whether to and on what to spend it. These sleeves were different than the sleeves used for the narrow band filters. At the end of that thread I posted a set of data collected on the Alnitak region with the ZWO filters and my ASI1600MM-C camera with all the fixes for the hardware to get those filters working. We look forward to helping you start your astronomy journey! As the bandwidth becomes narrower, the nebula pops out of the background, as does the faint surrounding nebulosity. David Astro. Steep spectral profile minimizes halos around bright stars Actually, the >90%T is a legacy specification, since new production technologies employed over the past 3-4 years routinely produces 97-98%T at the emission wavelengths. Since I put the ZWO masks in place, this is not really fair, but that was what I have here: Bright Light transmission through the 36mm Astrodon E-series LUM filter. By using our shop you agree to the use of cookies. These two factors combine to provide you with the highest contrast available. H-a emits at 656.3 nm and NII emits most strongly at 658.4 nm (and weakly at 653.8 nm). This usually works, but not always. ). The big challenge was with the non-linear stretch - I dont think that they are really the same. The halo on Alnitak is also clearly better. For reference, I purchased the 5nm bandwidth Ha, SII and OIII filters and the E-series LRGB set. The guaranteed >90% transmittance at the emission wavelength provides you with the highest signal available. Let it go. I have learned a lot in the process. Im following this thread. Again, this saves you precious imaging time and thus, simplifies your imaging. Peak transmittance guaranteed >90% at the emission line (97-98%T typical) f/10 to f/3.5 for both 3 nm and 5 nm They are also a good choice for the latest Sony and back-thinned sensor. They were processed identically in Pixinsight. Glad to hear you are excited to get more data with your Astrodon filters. This is not akin to whether or not Denon or Sony make better audio equipment at all. The ZWO filters should be great for galaxies and a lot of nebula where ther are no monsters like Alnitak. They did fit quite well in the ZWO wheel. This is basically the unboxing and installation of the Astrodon filters into the ZWO filter wheel: The narrow band filter each came in the own separate boxes. There was a bit of asymmetry to the narrow band flats histogram, but it was very slight. Stop please. Astrodon >>>>>>>>>>>>>>>>>>>>>>>>>>> Others. You didnt hurt my feelings, dude. We offer 5 nm and ultra-narrow 3 nm bandwidths. 31mm Round Mounted (HA3_31R) The E-Series filters were designed for cameras containing the full-frame Kodak KAF8300, KAF3200, KAF6303, KAF16803 sensors. 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. At some point I will see what they look like without the filter masks. I suspect that my processing skill are being surpassed by the quality of the data with the filters. using them. Random tests of a competitors low-cost 7 nm H-a filter showed %T values ranging from 86% down to 71%. It has a huge amount of data in it and I highly suggest reading it in full if you are considering filter purchases or how to fix these types of issues. The intensity rings are very weak and are only visible with the extreme non-linear stretch. If it was to me and the result I published then I am at a loss as to what makes you so annoyed - it sure seems that you are. What do we mean by this? Back Ordered - We're Working With The Supplier To Obtain Delivery ASAP - Will Ship First Order In - First Order Out - As It Becomes Available. Very consistent with what I found with the Astrodon narrowband filters compared to some 3 year old Baaders. 36mm Round Unmounted (HA3_36R) Astrodon H- filters have a center bandwidth of 656.3 nm. For many emission nebulae, H-Alpha, OIII, and SII filters all give you that Hubble look. Leaving you with confidence knowing you are making the right decision and one that is perfect for you and your goals of viewing the night sky! After creating the master flats, I then used the STF to do a stretch of each masterflat and showed the histograms. The frame allows the filter to be attached to a connector, a filter holder or in the housing of a camera. Please verify this This means that your RGB color combine weights will be approximately 1:1:1 within perhaps 10% for equal length exposures. The Narrow band filters had backened edges. I also creates simple HSO channel combinations for each filter set: This is not recommended for shared computers, Question re: wiring for LED w/ Rocker Switch & 3V Battery, SV202 10x42, OB Sport ED 10x42, SCOOPX 10x42, N.I.N.A Advanced Sequencer parking with EQmod (defined park position). The next filter to complement your LRGBH-a set is an oxygen filter. This guaranty is expensive to manufacture for such spectrally narrow filters, but it assures you in writing on each filter box that you will get what you paid for. At some point I will remove the ZWO masks and test this again. For me, my time and getting nothing to show for a lot of imaging time led to enough frustration that I forked over the cash. Then did noise reduction with a Multiscaler linear Transformation. All the filters were fully coated to the edge - unlike the ZWO filters. AstrodonNarrowbandfilters set a new bar of performance and durability for imaging and research. Pour obtenir un service personnalis en franais, merci de communiquer avec nous par tlphone ou par courriel. Bright Light transmission through the 36mm Astrodon E-series RED filter, Bright Light transmission through the 36mm Astrodon E-series GREEN filter, Bright Light transmission through the 36mm Astrodon E-series BLUE filter, Bright Light transmission through the 36mm Astrodon 5nm OIII narrow band filter, Bright Light transmission through the 36mm Astrodon 5nm Ha narrow band filter, Bright Light transmission through the 36mm Astrodon 5nm SII narrow band filter. This is in stark contrast to the unmasked ZWO filter flats that caused all this issue. >4 OD (out of band blocking) 300 1150 nm They are truly amazing. Acclaimed for their ability to reduce halos around bright stars, Astrodon Narrowband filters are still able to accomplish this even for long 30 to 45 minute exposures common to narrowband astrophotography. The data was taken at a camera temperature of -20C. After a crop to remove the dark edges, I did a DBE using the Ha frame as the reference to remove any gradient. Since moving to the Astrodon (5nmHa, 3nm OIII&SII) I have hardly had to mess with "magenta halos" or other odd looking stars when blending. Add Apertura Air Blower for Lens Cleaning - BULB to your order? It will take some time but should be a lot of fun. OK so here is the imaging tests - the money post so to speak. This is the Ha filter. I also had previously posted a thread asking what were the benefits of the Astrodon filters and were they worth the price premium. 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. I do think they are worth the investment. Yes, our filters are more expensive, but you always know what you are getting with Astrodon Narrowband filters the best performance in the market guaranteed. But, this assures you that you can take advantage of the improved contrast with our narrower filters compared to the much less expensive 7- 8.5 nm filters on the market. The basic imaging set of 5 filters becomes LRGBH-. Sign up for savings and product announcements. Hydrogen-alpha H- 656.3 nm 5 and 3 nm, Red Continuum RedCon 645 nm 5 nm only, Oxygen OIII 500.7 nm 5 and 3 nm, Other emission lines, bandwidths and sizes upon request, Warehouse Prices (Amazon, Best Buy, etc. Free Shipping to lower 48 states for all orders over $100, Astrodon I-Series LRGB Filter set unmounted 36 mm, Set includes Luminance (NIR/UV-blocked colorless), Red, Green and Blue filters, 3 +/-0.025 mm single 1/4 wave fused silica substrate before coating, ~1:1:1 color combine weights for G2V white-point for Kodak Interline detectors, Better color rendition for galaxies based upon color theory, Significant reflection and star halo reduction, Spectral "gap" between green and red filters to reduce the effects of light pollution, Highest efficiency blue filter with less UV, Correct "teal" OIII color for planetary nebula (OIII signal >97% in blue and green), Ultra-hard and durable sputtered coatings coated to the edge of each filter. picture accurately reflects the product described by the title and description before you place Parfocal with all other Astrodon filters (depending upon telescope optics) That being said - I am going to keep the ZWO filters since I hope to get a second ASI1600MM-C for my other OTAs and retire my Canon T5i unmodified. Nous vous remercions de votre patience. The Luminance and Blue filters are the same as those in ourE-Series. Atik Electronic Filter Wheel EFW2.2 7x36mm unmounted, 4,000+ items available to deliver from stock. The other thread I referred to in the first post on this thread has all the details about reflection issues with the ZWO filters, how to suppress them and how to process the remain effect out of your images using pixinsight. The USB was set at 90 for both. The LRGB filters did not have blackened edges like the narrow band filters. However, since I have them and have paid the price, all I can say is that I cant wait to collect more PHOTONS!!! The filters were, however, fully coated to the very edge unlike the ZWO filters. Astrodon's latest narrowband filters, as a matter of fact, typically achieve between 95% and 98% transmittance. Information about areas of application serves as a rough orientation. La version franaise de Astronomie Plus est prsentement en cours de traduction. For the narrow band filters, the camera gain was 200 with offset of 40 and for the LRGB filters, the camera gain was 76 with an offset of 40. With a guaranteed transmittance of more than 90% at the emission wavelength providing the highest available signal, combined with such spectrally narrow bandwidth filters, imagers can be confident of attaining maximum contrast. Whether they are worth the cost was the subject of an other thread that I referenced above. Other filter suppliers try to "force fit" their orange filter (designed for the interline KAI11000, KAI2000 sensors) for use with these full-frame sensors. For the best experience on our site, be sure to turn on Javascript in your browser. And again thanks to everyone who has contributed to this set of post. Yes they are worth it. Astrodon NB filters are renowned for not producing halos around stars and not leaking NIR light. W will be closed next week, from Monday August 1st to Wednesday August 3rd, for the annual inventory. Similarly, analysis of different 2016 lots of Astrodon 3 nm H-a filters measured 97, 97, 97 and 96%T. However, most imagers blend their H- data into their red RGB data to enhance structural detail while maintaining a natural look. I was disappointed by this also and had seen other threads complaining about this same issue. Im hoping this thread will help guide me. Only logged in customers who have purchased this product may leave a review. However, in the mean time, I had already bit the bullet and ordered a full set of LRGB, Ha, OIII and SII filters from Astrodon to replace the ZWO filters.

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