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Old 09-06-2016, 05:58 PM
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Atmos (Colin)
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Atmos is offline
Join Date: Aug 2011
Location: Melbourne
Posts: 6,866
Originally Posted by codemonkey View Post
I believe the flattener is M66 on the scope side and M62 on the camera side. I need it to sit between a Celestron OAG, and an Orion Nautilus EFW, and I understand spacing of flatteners to be critical (never needed one before, so I don't know how critical).
Some are not too critical, I believe that straight flatteners are more forgiving than a flattener & reducer. My last setup was maybe 1.5mm off and it was noticeable.
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