SVBONY SV220 Telescope Filter, 2" 7nm Dual-Band Nebula Filter, Reduce Stray Light, H-Alpha&O-III Narrowband Filter for One-Shot Color Camera, Telescope Accessories for Deep Sky Astrophotography

Great filter at a good price! Good results with my stock/unmodified canon DSLR. Still able to focus on bright stars using a bahtinov mask. Suppresses over exposed and bloated stars, minimizing the need for star reduction. Blocks almost all moon-glow, allowing more emission nebulae to be imaged during the full moon. Of course it's not suitable for reflection nebula and galaxies, since it only passes Ha and OIII.

Awesome filter, I use it almost every session

I am using this on a Celestron Origin Mark II the filter is much better at reducing Halos compared to the Origin nebula filter direct from Celestron and for very comparable price. It doss limit the light bands enough that it's difficult to polar align the origin with this filter in place so after polar alignment and initialization you can switch to this filter and while pointed at fairly bright stars get an auto focus . Very happy with the outcome and results from this filter . Highly recommended for the Celestron Origin

This filter works amazing for adding contrast to emissions nebulae, especially for OSC and DSLR cameras. It is a narrow band filter, so it will cut out a lot of light by design. I've found that doubling either time or ISO gets you pretty close for exposure. If you're wanting to start imaging emission nebulae, I highly recommend this filter. I've attached pictures of the Orion and Rosette nebulae that I took through this filter. Imaging was done in class 5 conditions with a stock Canon R100 and a Skywatcher Quattro 150P

Just buy it. Got it today. The 7nm works at f2 on a C6 hyperstar. Pics in a bortle 5/6. The difference is night and day. The vail nebula is 40 minutes of integration, Andromeda is 1 hr, and the Christmas tree cluster is 2 hr. Processed real quick in siril.

This cut down on the light pollution and gradients in final images exponentially. Great buy, bortle 5/6 skies. Images shot with svbony sv503 80ED w/ this filter and ASI533MC Pro. Processed with GraXpert and Siril

Giving this a 4 for the time being since I'm using an unmodified DSLR which isn't very sensitive to Ha. That said I'm getting very decent results. I'm now in the North Carolina mountains (Bortle 5-6) so I expect to get better results and I have an ASI533MC Pro on order. Wwill update the review after testing with a real astro camera. Attached are images of NGC6992-C33-Veil Nebula and NGC2359-Thor'sHelmet taken in Bortle 8-9 skies near downtown St, Petersburg, Fl and with < 1 hour imaging on each.

I have posted 4 images total, 2 whith the SVBONY 220 Dual band filter on and 2 whith the filter off. These where taken whith an IPhone 15 pro and a 102mm maksotov scope in a Bortle 7-8 sky these are single 30 second exposures mostly low on the horizon 20-43 degree above horizon whith intense light glow. It has done an excellent job of removing the light pollution and really showing the nebulas color as well as contrast! I simply can’t recommend this filter enough it’s pro quality for half the price of Optolong filter. The images above are in order the Eagle Nebula messier 16 and home to the pillars of creation the second image is the lagoon nebula messier 8