SVBONYTelescope Filter 2 inches UHC Filter for Observations of Deep Sky Objects Ultra High Contrast Filter Reduce Light Pollution

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.

ease of use, Hobt pops straight into my camera and the performance was pretty great in my opinion and it’s not that expensive

I try to keep my astrophotography habit within a budget. It is not always easy. This little filter, however, is fantastic. You can see in the chart on this page how this filter lets specific bands pass, while blocking other light, mainly light pollution. I live in a bortle 5 in small town NC. However, both of my neighbors have security lights on all night (uggh). This filter does the job it says, blocking pollution that makes photos look overexposed, while letting in reds and blues. It fits my Canon t6 perfectly (after pulling out the bottom prongs a little), and stays snug while it sits at prime objective attached via a T-Ring adapter on my achromat. Note that this filter will not allow you to use any lens that needs to attach to your camera that uses autofocus, etc. as it blocks access to the electronic pins. However, if you are using the camera at prime focus on the telescope directly, it is perfect. Pictures in RAW tend to have a tint to them, but this can be adjusted out with a color balance in post processing.

I bought an old EOS 500d and tried to take astro photos from light polluted city.Results were not perfect so I bought this filter.Filter seems to be of high quality and fits well into camera.It seems to work and improves contrast on faint object however color shift is not easy to handle.Also it reduces amount of light entering camera so exposure must be much longer.

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.