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Lens won't focus?


crazycolt1 3 31 United Kingdom
10 Mar 2014 9:26AM
Hi
I've an 18-55mm lens that came with my Nikon camera, and it keeps constantly 'hunting' can't get it to focus. Has it had it? Thanks.

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MikeA 10 1.2k England
10 Mar 2014 9:36AM
I have Canon but had similar problem until I read the manual and found three different focus modes, once set to the most suitable mode for the shots I was taking at the time, problem was solved. Sorry not too an informative reply but should give you food for thought.
crazycolt1 3 31 United Kingdom
10 Mar 2014 9:42AM
Thanks Mike, I'll check that out. Trouble is, it's only recently started doing it, hence may be broken!
thewilliam 6 4.8k
10 Mar 2014 8:19PM
Whenever we suspect a problem, we do a "half-split" test. Put the lens on a known good camera body (either yours or a friend's) and a known good lens on your suspect body. This will tell you which part is at fault.

The vast majority of problems are either "finger trouble" where some setting has slipped, or bad connections. These cost nothing to check.
12 Mar 2014 8:39AM
Carefully cleaning the lens bayonet and camera throat contacts solves most but not all AF problems.
If a careful clean does not get it working it will cost more to repair than it is worth.
thewilliam 6 4.8k
12 Mar 2014 8:45PM
We have a "holy trinity" of remedies:-

when it moves and it shouldn't, use gaffer tape
when it should move but doesn't, use WD40
If it's an electrical problem, spray the contacts with Electrolube Switch cleaner and wipe them with a soft, lint-free cloth.

Simple!

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