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Your Focal Length Spread?
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04-08-2017, 01:49 PM
Marke
(Mark)
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Join Date: Nov 2009
Location: Sydney
Posts: 1,193
80 , 102 , 250 plus minus 0.67 focal reducer. Then look up object in either SkyX or CCDcalc and compare the projected fov with the object size and use what best fits.
Marke
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