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camera over a wide range of shutter speeds even if
the batteries fail. Another benefit of using mechani-
cal control for the majority of speeds is that the
Canon EF uses only two inexpensive 1.3 volt mer-
cury batteries which are available almost anywhere
in the world.
Canon FD 300mm f/5.6 S.C., 30 sec., AE, ASA400.
Not For Resale – Free Download at http://www.joe-chan.com/manuals
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