Eyepiece: 10 mm Zeiss Abbe ortho EP (540x magnification) “This is the most recently made 7" triplet airspaced Fluorite Apo with excellent colorcorrection, smooth optics and a good spherical correction. But again the CCD-images suffer from a contrast problem. The optics are rated during startesting at 1/6~1/7 wavefront but with a tiny turned down edge problem, which is under a reals sky almost fully invisible.” Markus Ludes (APM-Telescopes) NOTE: Due to the central obstruction of the 10”MN telescope (55mm) this telescope shows an artificial central obstruction of 31%. |
