Used Optolong 2" LRGB Filters (4 pieces)

This is a set of 2" Optolong LRGB filters designed for deep sky and planetary imaging, intended to improve color differentiation and reduce light pollution.

• The filters divide the spectrum into red, green, blue, and luminance components.
• The OIII emission overlaps on blue and green filters with maximum transmission.
• The gap between green and red filters blocks the primary Sodium light pollution line at 589 nm.