Focal Lengths and Deep Sky Astrophotography
> Canon 200mm+1.4x on APS
22 Sep 2006
Canon 200mm+1.4x on APS
Shab Tombs, Oman
Autofocus on a bright star or planet also works when you add the 1.4x tele-extender.
Hutech Canon 20D w UV/IR Blocker,Canon 200mm/2.8L II + 1.4xII
56x2-minutes, lens wide open at an effective f4, ISO 1600. Mount: Kenko Skymemo.
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