ZWO LRGB 31mm Filters
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
Technical Parameter:
➠ Name: ZWO 31mm LRGB filter (4 filters)
➠ Size: D=31mm
➠ Thickness: 2mm
➠ 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.

Transmission Curve
