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Old 05-09-2017, 10:43 AM
raymo
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raymo is offline
 
Join Date: Sep 2011
Location: margaret river, western australia
Posts: 6,070
I think you are right Alex. I used a 3 and a 2, and the image quality was
dropping off quite noticeably;mind you the 3 was a cheapie. Maybe with premium barlows I could have used two 3s.
Raymo
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