Celestron reduction lens f/6.3 Reduction lens f/6.3

Reducer / corrector f / 6.3-with 2-inch inside thread (not for Edge-HD) This sensible lens correctoring system beats several flies with one stone: The 4-linent Focal Reducer shortens the focal length of all Schmidt-Cassegrain Telescopes around 0.63. The opening ratio changes from 1:10 to 1: 6.3. This results in a much larger field of vision and a factor of 3 shorter exposure times. The optical correction system paves the slightly curved image field of all Schmidt-Cassegrain Telescopes. This means that a fully corrected, vignetting -free "Richfield" visual field of 24 mm diameter is available. The focal lengths of the Celestron SC-telescopes change as follows: C-5: from 1250 to 788 mm / f 6.3 C-8: from 2000 to 1260 mm / f 6.3 C-9: from 2350 to 1480 mm / F 6.3 C-11: from 2800 to 1764 mm / f 6.3 C-14: from 3910 to 2457 mm / f 7.3 The Celestron Focal Reducer can also be used visually. It has the Celestron SC thread on both sides and is screwed directly to the tube of telescopes. It can also be used in combination with the radial guider - for photography and for CCD cameras.