different AF drive

greenspun.com : LUSENET : Canon EOS FAQ forum : One Thread

i want to know what are the differences between micro motor,usm , micro usm and arc form drive? can anyone give me some data about 70-210mm f/3.5-4.5 lens? thanks very much

-- albert (fibrebundle@hutchcity.com), July 11, 2001

Answers

http://www.photo.net/photo/canon//lens-motors.html

and

http://www.photo.net/photo/canon//70-210

Note that Greenspun says, "You do not really want a lens with (AFD)". Well, given the choice between a USM lens with FTM and an AFD lens, I'd definitely go for USM, sure. If money were no object. But if it is an object I'd go for optical quality over motor quality any day.

-- NK Guy (tela@tela.bc.ca), July 11, 2001.


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