Review on Astromania III Filter Produces Near Photographic by Brandon Guidroz

I think the filter thread is great, the filter is clean and the delivery is fast! Just a note: this filter produces a green image on monochrome cameras. I tested it and found that it reduced light to 1 full stop, which means the exposure time is at least 2 times longer than the exposure without a filter. I tried this on M 27 (the Dumbbell Nebula) and it did a great job separating OIII from the nebula (greenish image). The second image shows the colors with no filter (note that the red tones are visible in this unmodified DSLR image). Astromania also gives great discounts if you order multiple of their items at once. I did it and saved $$$!