SVBONY Telescope Filter 1.25" UHC Filter Astrophotography to Improve The Image Contrast Reduces Light Pollution (1.25 inch)

As far as images I am really surprised at how well this works. From Bortle 6-7 on the bright emission nebula in orion, it helped bring out more color and cut down the orange glow (only a single sub before the clouds came). For visual use I didn't notice much difference but to be fair when I tested it visually I was in bortle 4 to 5. I imagine it helps more, the more light polluted your skies are.

This broadband (50nm) UHC works well and has allowed me to view nebula (other than M42 / Orion Nebula) for the very first time from my light polluted backyard. I never thought I would be able to detect nebula from my backyard, where I do most of my visual observing using 8" and 10" F5 dobs. I'm in a red/white light pollution zone which is considered "Bortle 8" aka "can't see ****, captain". This filter hits well above its weight and is comparable to a more expensive Optolong UHC filter.Even with most of my city using LED street lights, whose light pollution is harder to filter out, this filter performed exceptionally and allowed me to detect nebulosity in Scorpius last night. The nebulosity was faint, but it was absolutely there. I didn't need to use averted vision or any other aids to detect it. With visual observing, you can't expect bright Hubble views albeit I suspect this filter would work exceptionally well for astrophotographers, who will be able to achieve great results with this filter + long exposures. The fact that I could visually detect any nebula at all that wasn't M42 in Orion makes this worth the measly $20 paid.Members of a popular astronomy forum have sent the SVbony UHC filters out to Lumicon- one of the top optics and filter labs- and it revealed that this filter is virtually identical in performance to Optolong UHC filter and may even be the same thing. The Optolong is well regarded and sells for $80; a $20 SVbony performing the same as a filter that is 4X as expensive is a great deal.The price and the performance of this makes it a must have filter if you don't have one. I'm not a fan of filters as I find the price:performance underwhelming for visual observing, but this filter hits all the right notes. I will likely buy SVbony's 2" version of this filter, I like its performance enough that I want it available for my 2" wide field EPs. I wish SVbony made an OIII; I'd buy it in a heartbeat if it performed as well as this UHC.

These will only fit onto an eyepiece, a minor oversight on my part, but it isn't large enough to fit anywhere in the optical tube. For DSOs that are primarily red and blue it makes a huge difference, but if you want to look at galaxies, don't bother with filters.

Glass had strange oily marks resembling spaghetti noodles on both sides. Was this some kind of disgruntled employee at the factory? Was this a previously returned item? I'll never know. I tried my best to clean it, but several spots remain. Replacing immediately.Edit: amazon exchanged it for another and this one is perfect.

This is my second attempt at photographing the Orion Nebula (M42, "The Great Nebula In Orion"), and only the second deep sky photo I've ever taken.I'm happy with this. It is the result of 88 images stacked in Deep Sky Stacker, ranging from 1 second to 35 second exposures, ISO 3200. I used a few Dark Frames and Bias Frames, but no Flats, so I probably could have done better, and I would recommend ISO 1600 maximum.I used a Celestron Nexstar 6se on an Alt-Azimuth mount, 2-star alignment using Sirius and Polaris, f6.3 (Celestron Focal Reducer), approx. 1053 mm focal length, Canon T3i with SvBony UHC (light pollution) clip-in C-frame filter. I used a Bahtinov mask to confirm focus on Sirius prior to using "Bulb mode" on the camera with a cable release made by Apurture.Yes, I said Alt-az mount, no wedge, not polar aligned. With a wedge I could do 2 minute subs instead of the 30-second maximum I was boxed-in with.Seeing conditions were Bortle Class 6 with a street light directly in front of me, so think more like Bortle 7. Final image adjusted for levels, color correction, and contrast in Photoshop CS 2020.I'm blown away.Without this filter all I got was a yellow haze and a grainy image.I'm probably going to buy their CLS filter as well, even though the bandwidths are very similar.I also bought their 1.25 inch eyepiece UHC filter for visual astronomy. I'm sold on this company.Highly recommended.

This SVBONY Telescope Filter 2 inches UHC Filter is not bad, but not great, but not bad. It is certainly worth the price you pay for it. If you are getting into using 2" filters for astrophotography, this is a decent starting point. Results have been decent. I live in a Bortel 3-4 sky area and it indeed does cut through some of the light polluted skies. I also have the SVBONY CLS and UV/IR Cut filters, which are both decent for different deep sky objects. Don't know if it would work well in anything above a Bortel 4, but is worth the dough if you don't want to spend a couple hundred dollars (or more) for a higher end filter such as the Optolong L-eNhance, which is superb.