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Accepts GM2DT 2" drawtube snout
CAMERA QUARK Filter For CANON - CHROMOSPHERE Model
a 2” Velcro strip is included so that you have the option to place the controller on your telescope set up
2X telecentric barlow lens fully optimized in coatings and optical design
Daystar ERF 130mm with 190mm Cap - E-190N130 Nikon Accepts GM2DT 2" drawtube snout130mm ERF Glass, Cell & 190mm ID Cap For Refractors DayStar Energy Rejection Filters reduce the heat load on your filter assembly by absorbing or reflecting UV and or I light and transmitting light in the desired visual spectrum. These filters are sometimes Red or Yellow glass, or dielectric IR and UV, but pass light in the desired visual spectrum. The ERF can also serve as an aperture mask to accomplish a straight angle of incidence for light