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Old 27-07-2013, 06:46 PM
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Fox
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Join Date: Jun 2006
Location: Camberwell, Vic
Posts: 319
Alex, I guess it boils down to field stop. The largest possible field stop for a 2 inch EP is 46mm. IMHO my first choice would be Televue, because Al Nagler obviously has his f/5 scopes in mind. My second choice would be Explore Scientific. If you stick as close as possible to the 46mm maximum field stop for greatest TFOV, a 100 deg vs 82 deg vs 68 deg FOV eyepiece will give you progressively smaller and smaller images for the same TFOV.

I agree with everyone above; I don't see much point in buying somewhat less expensive brands and designs if the outer edges of the field results in stars which look like seagulls and comets. And I would also add that the smaller the focal length of the eyepiece will give smaller images and less contrast - so the sky may look too washed out.

Another alternative - looks as though some manufactures are beginning to make 3-inch eyepieces. Awfully pricey I bet, and perhaps the size of your focuser will start becoming an issue.

Fox
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