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Old Mar 30, 2005, 12:32 AM   #1
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I heard that the 7D has the AF motor IN the camera. . .how does that work, compared to other cameras?
Or is this totally incorrect information :lol:
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Old Mar 30, 2005, 5:41 AM   #2
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Yeap, just like Nikon - the AF motor is in the camera except for the 'SSM'(Minolta) or 'Silent Wave'(Nikon) lenses which are ultrasonic (ie USM for Canon), the motor is in the lenses instead...

Canon is the only one who have motor in the lenses.
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Old Mar 31, 2005, 12:10 AM   #3
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Does this perhaps give you a faster AF over a wider selection of lenses? As compared with a Canon lens, if you got a cheap lens, and a cheap/slow AF motor?
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Old Mar 31, 2005, 5:22 PM   #4
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I doubt it since the same motor drives different gearing ratio depending on each lens (ie the AF focus depends on the camera + the lens gearing) like 'pro' bodies focus faster than consumer's even with the same lens! - whereas with Canon each motor is optimized for that lens only independent from the camera

One advantage is, at least on the Nikon, the camera's battery lasts much longer than on a Canon because of this internal motor - On Minolta with the 'anti-shake' who knows???

Canon camera, at least my 10D, doesn't take as many shots as a D100 for example:
1. May be some Canon lenses draw more current than other
2. The 'IS' in the Canon also consumes power and takes away from the shooting part
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Old May 9, 2005, 6:01 PM   #5
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among other things, the in camera AF motor enabled Minolta to make an excellent REFLEX f8 500mm with FAST auto focus (only one of it's kind)
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