Omega Optical Improved NPB DGM Filter by Jim Thompson, P.Eng Test Report – January 30th, 2015 Introduction: Omega Optical is a
![Comparison testing of available narrow tri-band filters - Page 3 - Beginning Deep Sky Imaging - Cloudy Nights Comparison testing of available narrow tri-band filters - Page 3 - Beginning Deep Sky Imaging - Cloudy Nights](https://i.imgur.com/8EifTps.jpeg)
Comparison testing of available narrow tri-band filters - Page 3 - Beginning Deep Sky Imaging - Cloudy Nights
Mixed Results w/ NPB Filter on Lagoon, Swan & Dumbbell Nebulae: Astrophotography Talk Forum Forum: Digital Photography Review
![UHC" filter shootout - DGM NPB vs Celestron UHC/LPR vs Lumicon UHC vs Starguy UHC - Equipment (No astrophotography) - Cloudy Nights UHC" filter shootout - DGM NPB vs Celestron UHC/LPR vs Lumicon UHC vs Starguy UHC - Equipment (No astrophotography) - Cloudy Nights](https://www.cloudynights.com/uploads/monthly_11_2015/post-227590-0-50971700-1446387752.jpg)
UHC" filter shootout - DGM NPB vs Celestron UHC/LPR vs Lumicon UHC vs Starguy UHC - Equipment (No astrophotography) - Cloudy Nights
![UHC" filter shootout - DGM NPB vs Celestron UHC/LPR vs Lumicon UHC vs Starguy UHC - Page 2 - Equipment (No astrophotography) - Cloudy Nights UHC" filter shootout - DGM NPB vs Celestron UHC/LPR vs Lumicon UHC vs Starguy UHC - Page 2 - Equipment (No astrophotography) - Cloudy Nights](https://www.cloudynights.com/uploads/monthly_11_2015/post-243922-0-28713400-1448457801.jpg)