Coma Correctors

This combination focal reducer and field flattener consists of a four-element multicoated 41mm lens in a metal cell. It threads onto the rear cell ...

Because the original 1989 TeleVue Paracorr (Parabola Corrector) eliminated the coma inherent in fast parabolic mirrors, it made reflectors with "fa...

The necessary companion for the Quattro Imaging Newtonians to achieve true professional images. The inherent problem with reflectors is coma as you...

Explore Scientific’s HR Variable Coma Corrector is a high-performance optical corrector designed by world famous optical designer Harrie Rutten, an...

.85x Reduction For Your Sky-Watcher Pro 100 ED APO Refractor Helps Correct Distortion Out to the Edge of the Field Requires a 48mm T-Ring So you wa...

.85x Reduction For Your Sky-Watcher Pro 120 ED APO Refractor and 150ED Refractor. Helps Correct Distortion Out to the Edge of the Field Requires a ...

.85x Reduction For Your Sky-Watcher Pro 80 ED APO Refractor Helps Correct Distortion Out to the Edge of the Field Requires a 48mm T-Ring So you wan...