TS Photoline 0.8x Focal Reducer and Corrector for Refractors from 102 mm Aperture The corrector increases the speed of your refractor telescope and reduces the focal length for a larger field.
TS Photoline 0.8x Focal Reducer and Corrector for Refractors up to 102 mm Aperture The corrector increases the speed of your refractor telescope and reduces the focal length for a larger field.