Premium LRGB imaging filters for the ZWO ASI1600MM, providing a 1:1:1 color ratio between the R, G, and B channels.
1.25" mounted filters. 5.5mm filter thickness, with an additional 3.5mm thickness on threads. This filter set is parfocal, so there should be no need to re-focus when changing filters. The red filter also cuts infra-red wavelengths.