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Old 31-10-2010, 05:04 PM
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Octane (Humayun)
IIS Member #671

Octane is offline
Join Date: Dec 2005
Location: Canberra
Posts: 11,159
Looks like you're up and running, Martin, top stuff.

I would imagine that f/5.6 would have been enough (closed down one stop).

Also, get rid of the UV filter on the lens! You'll only degrade the quality of the image by having light go through another layer of glass (typically, they're nowhere near the quality of the Canon glass, either).

Incidentally, I'm picking up the 70-200mm f/2.8L USM (non-IS) on Wednesday. I already have the 200mm f/2.8L II USM for astro, and, it is superb. Perhaps that's one you should look at, too.

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