BAADER RCC I, Rowe Coma CorrectorThe RCC I is designed to correct Coma in fast Newtonian imaging systems. It provides a long back focus of 91. 5 mm measured from the T 2 thread, enabling the use of Off Axis Guiders, Adaptive Optics and Filter Wheels. Autoguiding can be done easily with the RCC, an RCC Off Axis Guider and an Autoguiding Camera. The RCC works from f 3. 5 to f 6 it is perfect on f 4 reproduction scale is 1: 1 in contrast to many other coma correctors, the RCC is no