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102mm APO Triplet Refractor Telescope (Optical Tube Assembly)
galaxies) are reduced visibly
allowing the mount to track astronomical objects accurately
Explore Scientific 100° 25mm Hyper-Wide Eyepiece
Daystar ERF 150mm with 200mm Cap - E-200N150 Accessories_Interference Eliminators 102mm APO Triplet Refractor Telescope150mm ERF Glass, Cell & 200mm 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