Daystar ERF 80mm with 120mm Cap - E-120N80 User Experience_Advanced Tons of Features Included With

Tons of Features Included With Starry Night Pro 7

computerized telescope control

3500 unique object text descriptions for stars

The filter is optimized for systems with focal ratios between f/0

Daystar ERF 80mm with 120mm Cap - E-120N80 User Experience_Advanced Tons of Features Included With80mm ERF Glass, Cell & 120mm 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 entering