Canon 40mm STM misfocus issues

Started Oct 11, 2012 | Discussions thread
Lawrencew
Veteran MemberPosts: 3,529Gear list
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I had to get mine recalibrated
In reply to Nightly, Nov 26, 2012

I had a issue with my new Canon 40mm STM.

I was getting a lot of out of focus shots and so I did some simply tests and realised was constantly back focusing.  Stopped down it may not have been noticable due to the DoF. But I realised this was causing the problem when I used the lens wide open,

I could have returned it for replacement, but who knows I could have had the problem with that too.

So I sent it to Canon who recalibrated it FoC under warranty.  And now it works perfectly, and is one of my sharpest lenses.

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Regards Lawrence My Flickr http://www.flickr.com/photos/lozwilkes/

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Canon EOS M Canon EOS 70D Canon EF 70-200mm f/2.8L IS II USM Canon EF-S 18-135mm f/3.5-5.6 IS STM Canon EF-M 18-55mm f/3.5-5.6 IS STM +4 more
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