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Old 16-02-2010, 09:40 PM
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Tunnel Vision

AlexN is offline
Join Date: Mar 2008
Location: Brisbane, Australia
Posts: 6,708
Astrodon I series 50mm unmounted jobs...

What other refractive elements do you have in your optical train apart from the filters and the telescope lens? I think the MPCC I use to flatten the field skews the parfocalism (is that a word?) Either that or the LPS filter? or a combination of both...
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