Baader IR-Pass 670nm Filter - 1.25" Round Mounted - FIRP-1 Discontinued The 17 mm Plossl included

The 17 mm Plossl included in the Celestron Observer's Accessory Kit will double in power

Secondary Obstruction by Area:  6%

Highest Useful Magnification: 213 x

The focal plane is placed at the end of the barrel to minimize vignetting

Barrel Size: 2" / 1

Baader IR-Pass 670nm Filter - 1.25" Round Mounted - FIRP-1 Discontinued The 17 mm Plossl includedAbout the Baader IR Pass 670nm Filter Baader Planetarium delivers the latest tool in the planetary imager's bag of tricks. The Baader 1. 25" IR Pass Filter blocks wavelengths below 670 nm. At these longer wavelengths, planetary images are less disturbed by wavefront distortions in the atmosphere (seeing). By combining a luminance image taken with the IR Pass filter, along with RGB frames, overall image sharpness is significantly enhanced. Some of the