ZWO LRGB 2″ Filter Set
ZWO’s 2″ LRGB set comes complete with 2″ Luminance (UV-IR Cut), Red, Green, and Blue filters. ZWO’s filter design boasts excellent 92% transmission at passband, great optical coatings, and good color separation.
The LRGB filters have a mechanical thickness of 5mm, with an additional 2.5mm added for the thread. The optical thickness measures in at 1.85mm. Each filter is more parfocal with a thickness of 1.9+/-0.03 mm. As for the thread, this LRGB filter set comes with a M48x0.75 thread on each filter.
Each filter is fine-optically polished to reach an accuracy of 1/4 wave and is equipped with anti-reflection coatings. With the infrared wavelength, there is a 700-1100nm cut off. ZWO has included a spectral “gap” to minimize the effect of light pollution. Additionally, the ZWO LRGB filters have precision off-brand blocking.
