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Canon EF 70 - 200 f2.8L IS USM Zoom lens
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03-05-2013, 01:41 PM
Octane
(Humayun)
IIS Member #671
Join Date: Dec 2005
Location: Canberra
Posts: 11,159
Don't remove the lens during an exposure.
Instead, stop down the lens to whatever aperture you desire, press the depth-of-field preview button on the side of the body, and, then remove the lens while the button is depressed.
H
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