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Something like this to get 100% illum through a 2" focuser
* 250. mm f 4.7
250. primary mirror diameter
4.7 f ratio
305. tube inside diameter
1.5 tube thickness
25. extra focus height
0. camera focus height
55. diagonal minor axis*************
70. focuser height
50. focuser diameter
150. focuser to front of tube
40. mirror to back of tube
0. fixed baffles (1 or 0)
mm unit of measure
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