Saturday, 20 August 2016

lens - Does rotating the focus ring in AF mode cause any harm?


If I rotate focus ring in AF mode, does this hurt the camera or lens? My friend today rotated the ring 1/2 times before I saw him on Autofocus on my Canon 600d with lens: EF-S 18-55mm 1:3.5-5.6 III. What damage could possibly have been caused?



Answer



The Canon EF-S 18-55mm F/3.5-5.6 III does not have a quick-shift autofocus system (although the STM version of the 18-55mm does). It does have an internal focus system like all EF-S lenses. This means that you can damage the lens but not the camera that way.


In all likelihood, the lens will not be damage though but in the worst case, you lost an extremely cheap lens which is a great opportunity to get something decent :) Simply try to use autofocus on subjects close and far to see if it still works. Image quality won't be affected any other way, so AF will or not.


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