Used in prime-focus imaging, reducers increase photographic speed while flatteners decrease image curvature away from the center.
Important Note: The following products were all designed for an optimum 55mm back focus. (Distance from flange surface to film or CCD plane). If you use a CCD, be sure the spacing between flange and CCD is 56mm +/-2mm for best results.
Users of the NP101is/NP127is scopes should also see Imaging System Accessories for LCL-1069 corrector.