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Old 03-07-2012, 06:28 PM
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sopticals (Stephen)
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Join Date: Jun 2010
Location: Oamaru, New Zealand.
Posts: 226
Smile ES 30mm 82deg v ES 24mm 82deg.

Which one would you recommend I should buy, for use in my scopes, (see signature). I want as wide as possible field of view, but not so much as to overly compromise exit pupil size.(I am 67 with v. good vision). The 30mm in the 22.2"(560mm) gives 100x with EP 5.6mm and the 24mm gives 125x with EP 4.48mm. I currently am using a GSO 30mm 68deg.(OK but not great). Also looking ahead to when I finish my 25.2" (640mm) f4.7 mirror. In the case of the 30mm the EP will increase to 6.4mm. The 24mm EP 5.12mm. Suggestions please.
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