The Starizona Night Owl Reducer / Corrector enhances both your field of view and focal ratio to get incredible images at a much faster rate with your standard SCT telescope. It uses a 4-element optical design to provide excellent image quality over a 16 mm image circle. With a backfocus of 38.5 mm, most popular CMOS and CCD cameras will be compatible.
The focal reducer is housed in a 2" diameter body and will fit into any standard 2" visual back or focuser on the rear of an SCT. The camera side connection is a standard M42 T-thread. There are M48 threads on the telescope side for using a standard 2" filter.