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Making a 6 inch f2.8 dob
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14-03-2019, 01:13 PM
Stefan Buda
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Join Date: Jul 2013
Location: Melbourne, VIC
Posts: 823
Good effort Logan, but don't forget that these tests are not very sensitive at this sort of f ratio. You may be surprised if the interferometric test shows a half wave raised zone near the edge.
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