Tecnosky 2.5 "Optical Corrector for APO 115/800 V2
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Giant optical corrector, 2.5", of exceptional quality, the field is completely corrected on refractors having a focal length between F / 5 and F / 9.
To the telescope there is a male thread M63 (compatible with the Apo 90 Tecnosky), by unscrewing a fitting we find a male thread M68 (compatible with the 3 "Tecnosky and similar that equip the triplets 115.130 and 102).
Side imager there is a wire M69x1; from this thread, the correct distance to the sensor is 91 mm.
The corrector comes with a spacer already mounted and well studied for digital SLRs (55mm) with an M48 thread, This corrector is also ideal for full frame sensor