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Old 19-07-2011, 08:30 PM
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mental4astro (Alexander)
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mental4astro is offline
 
Join Date: Jun 2008
Location: sydney, australia
Posts: 5,004
?Longest focal length EP for an 8" SCT?

Hi all,

I'm aware of the maximum exit pupil that should be allowed for should lie in the range of 6mm to 7mm. For an f/10 SCT that would mean an EP range of 60mm to 70mm. Are there design limitations within the SCT that would preclude the use of such eyepieces?

I ask as I've come across this eyepiece on ebay from Russell Optics.

Does anyone have experience with this eyepiece too? Such an eyepiece would give me close to 2 degrees AFOV.

Cheers,

Mental.
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