Astronomik Deep-Sky RGB Filterset 36mm, 3 filters planetary astronomy camera an H-alpha filter is the

an H-alpha filter is the best choice for all nebula glowing red

Appearance size: 47 * 47 * 14mm

the FocusCube should be placed on the coarse knob / direct shaft of your telescope focuser

--the package box is plastic pp-case with high density sponge carton lining

with the range of up to 1000 meters in the open area

Astronomik Deep-Sky RGB Filterset 36mm, 3 filters planetary astronomy camera an H-alpha filter is theAstronomik 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.