Askar 0.75x 91F Reducer (ASKAR91FR) newtonian even when tested with f/4

even when tested with f/4 scopes

Your Celestron Origin Mark II system comes complete with everything you need to become an instant astronomer:

iEQ30/iEQ30 Pro

virtually eliminating periodic error and solidifying the status of the EQ8-Rh as an imminently precise

Our unique two-sided planisphere has been in print for over 35 years and no chart is more respected or recommended

Askar 0.75x 91F Reducer (ASKAR91FR) newtonian even when tested with f/4The 0. 75x reducer can bring Askar 91F's focal ratio down to F 5, providing not only a faster focal ratio but also built in field flattening correction. The shorter focal ratio delivers a wider field of view and a faster exposure time, making it ideal for capturing large areas of nebulae, star clusters, and faint, fast moving celestial objects. The 91F 0. 75x reducer adopts a triplet design and supports a 44mm full frame image circle. The back focus