- Available in 6 colours for contrast enhancement of lunar and planetary observations.
- Largest free opening of all the colour filters on the market which eliminates any vignetting.
- Double 7-layer anti-reflection coating with only 0.25% residual reflection per surface (Phantom Group Coating)
- Available Filters: Dark Blue Filter, Light Blue Filter, Green Filter, Yellow Filter, Orange Filter and Red Filter.
- Both sides 7-layer AR coating with only 0.25% residual reflection per surface. This is the most antireflective that has ever been undertaken with color filters.