SHARPSTAR 2.5" FIELD FLATTENER 1.0x GSO Two locking knobs

Two locking knobs

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It has to be used without the UV-IR cut filter as it blocks the ultraviolet radiation

1390 mm (extended)

the backfocus of some telescopes is so short that it is not possible to use a standard  camera adapter which have a thickness of roughly 10 mm

SHARPSTAR 2.5" FIELD FLATTENER 1.0x GSO Two locking knobsThe SharpStar 2. 5" field flattener is one of the best and most universal correctors for apochromatic refractors. It delivers a fully illuminated circle for the full frame (24mm x 36mm) and a corrected image circle up to 55mm. Differently from many other flatteners, it does not reduce the native focal length of your telescope. In other words, its magnification is x1. 0. This allows the full use of the power of the telescope. The flattener is suitable