Astronomik Deep-Sky RGB Filterset 36mm, 3 filters circle the number of "H-alpha-photons" does

the number of "H-alpha-photons" does not change significantly whether an H-alpha filter is installed or not

If you’re using a DSLR or camera with limited dark current

well-corrected star fields across the frame

ensuring accurate colour reproduction and compatibility with major stacking and calibration software

With the Astronomik Deep-Sky RGB Filterset 50mm

Astronomik Deep-Sky RGB Filterset 36mm, 3 filters circle the number of "H-alpha-photons" doesAstronomik Deep Sky RGB Filter Set 36mm, 3 filters Our 36mm filters fit perfectly in all 36mm filter wheels from brands such as ZWO, QHY, QSI, Starlight Xpress, SBIG, Moravian, and Atik. Designed with a protective ring and blackened filter edges to prevent stray light, they are mechanically protected and easy to handle. The orientation of the filter in the filter wheel does not affect the optical performance, making it easy to set up and use.