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Old Nov 28, 2005, 3:08 AM   #1
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i'm new to SLR cameras and am thinking about more manual control. is it possible to use a lens designed for manual control of focus and apature in a digital SLR suck as the 350D.. if so do i have to specify the shutter speed or can the camera calculate this with this type of lens? either way it's okay, just with lenses being expensive.. i would like to know before i go spending money


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Old Nov 28, 2005, 4:00 AM   #2
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Hi Paul

I have no experience of Canon 350D, but with the Pentax *ist DS lenses can be focused manually, and those with an aperture ring can have the f stop set manually in M mode

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Old Nov 28, 2005, 11:36 AM   #3
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All Canon lenses have a switch on the side that lets you disable auto-focus.

Most/All USM lenses (stands for Ultra-Sonic Motors, their faster focusing, quieter lenses) have a feature called full-time manual override. This means if you start to manually focus the lens, it disengages the auto-focus until the next time you start up the auto-focus again. This is much easier to use than the switch.

Other than a mirror lens, there are no manual-focus only lenses for the Canon DSLRs (at least, none that I know of.)

You can always set the aperture and shutter yourself in, in the "M" mode, but that is independent of if you use auto-focus. You can also let it pick them and still manually focus yourself.

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