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ES 82D Eyepieces - Parfocal?
The Explore Scientific 82D series eyepieces are advertised as parfocal across the range, but a thread on Stargazers Lounge suggests otherwise.
Can anyone illuminate this a bit further? How parfocal are they and are there any that clearly aren't?
Thanks in advance.
(PS: I have 2 ES 68D eyepieces - 28mm and 40mm - that are close to parfocal, but not quite. Still some re-focussing required. Both are a long way from being parfocal with a Baader Hyperion 8-24mm clickstop zoom).
Last edited by Astro_Bot; 17-12-2012 at 08:23 AM.
Reason: Emphasis
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