Baader UV/IR Cut L-Filter Size::2" or sometimes a top quality

or sometimes a top quality commercially polished filter glass (fine for camera filters)

Skyliner models 150/200/250/300

unlike acrylic masks which are made from thick

Magnification (x): 25x

and the other direction to provide a flat surface

Baader UV/IR Cut L-Filter Size::2" or sometimes a top qualityUV IR Cut L Filter 1. 25" or 2" w LPFC Planoptically polished and hard coated! Blocks UV below 400nm and IR above (SII) 680nm. Maximum transmission, scratchproof hard coated. Baader Planetarium has introduced the world's finest UV IR cut filter. This filter is a must for all digital imaging with Digital Cameras, CCD Cameras, and modified WebCams. Also useful for protecting valuable H Alpha filters from heat stress and damaging IR. Due to their