The ZWO LRGB 31mm filter has better transmission, better coating, better color separation
the RGB color combine weights will be approximately 1:1:1
- Fine-optically polished to ensure accurate 1/4 wavefront
- more than 92% transmission at passband
- Infrared wavelength 700-1100nm cut-off
- Precision off-band blocking
- Multi-layers anti-reflection coating
- Small spectral “gap” to minimize effect of light pollution
- More parfocal – thickness 2 mm
Name: ZWO 31mm LRGB filter (4 filters)
here are the detailed photos
How to judge the positive and negative?
It is a little bit hard to judge the LRGB filters. Please watch the picture below carefully.