Ken Lin said: > Just when does an EOS lens (or any lens) gets to infinity? > > While there is usually a bit of over travel in the focus > adjustment to compensate for expansion in elevated > temperatures, is there a quick and dirty rules of thumb > when the subject is beyond a certain distance away, and > based on the focal length of the lens, that one can put > the lens in manual focus mode, line up the focus mark to > the infinity sign in the focus window on the lens, and > just start shooting away?
Beside the parameters you mention, it also depends on Aperture! All these parameters give you the depth of field. So take a look at a (online) depth of field calculator and fill in some typical values. You'll see what happens - the smaller the aperture (bigger number), the bigger the DoF (upto infinity)... http://www.shuttercity.com/DOF.cfm http://www.outsight.com/hyperfocal.html Cheers, Stefan * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
