Canon EF 100-400mm f/4.5-5.6 IS USM Lens Logo

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Mohammed Faizal Kakkat
Mohammed Faizal Kakkat Posted on Dec 18, 2012
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Canon EF 100-400 not auto focusing

My Canon EF 100-400mm f/4.5-5.6 IS USM Lens is not auto focussing. only work with manual focussing. I use it with canon 60D

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Paul Green

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  • Canon Expert 527 Answers
  • Posted on Sep 02, 2016
Paul Green
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Joined: May 09, 2008
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It is probably a broken ribbon cable in the lens. It will need to be replaced.

3 Related Answers

Anonymous

  • 67 Answers
  • Posted on Dec 11, 2008

SOURCE: Canon EF-S 17-85MM F/4-5.6 IS USM prevents features from working on 40D

something sounds strange about this. aperture 00 is an invalid aperture value. stands to reason if that is the case the camera would complain about it. via error code. being that its only six mos. old i would give canon a ring.

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Anonymous

  • 421 Answers
  • Posted on Jan 17, 2010

SOURCE: Canon EF 75-300mm f/4-5.6 III USM Lens

If your AF motor is hunting then the lens probably needs to be looked at. I wouldn't recommend this as something to do at home so you will need to either find a repair shop if it is out of warranty or return it to Canon if it is in warranty.

Anonymous

  • 6 Answers
  • Posted on Feb 06, 2011

SOURCE: MY CANON EF 100-400MM USM LENS WON'T ZOOM PAST

Is the lens tension adjusting ring too tight? Try loosening it and see if you get increased travel. If so, you may need to have it checked out.

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1answer

My 100-400 mm EF canon takes too long to auto focus.I like to take pictures of flying birds and i get alot of blurred pictures even at a shutter speed of 1/3200sec. I use the #2 position on the stabilzer...
Manually pre-focus to the distance you'd expect then the auto focus won't have far to move/lock on. Only turn the IS off if you are using a tripod. The auto focus works by detecting a difference in contrast so if the conditions are not compatible i.e a BG the same as the subject it will 'hunt and peck'.
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Jan 26, 2014 • Canon EF 100-400mm f/4.5-5.6 IS USM Lens
0helpful
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Canon 100-400mm lens AF only works when focus ring is jiggled
Replace the broken ribbon cable in the lens
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Aug 06, 2012 • Canon EF 100-400mm f/4.5-5.6 IS USM Lens
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How do I adjust my Canon EF 100-400mm infinity setting on the lent. 300 to 400mm is out of focus.
Hi,
I don't know your photography background and skill, so these tips may seem overly basic.

Have you tested this on a tripod? Not using a tripod can add a lot of blur, even while using the IS.
I would also try the lens at f/8 and see if you have the same focus issues. If not, it may just be related to shooting the lens wide open, where it's not the sharpest.
I hope this helps. It's just a few things to try.
Send a comment if you'd like some other possibilities.
Happy shooting with a great lens!
Read full answer
Mar 06, 2011 • Canon EF 100-400mm f/4.5-5.6 IS USM Lens
0helpful
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MY CANON EF 100-400MM USM LENS WON'T ZOOM PAST 150MM
Is the lens tension adjusting ring too tight? Try loosening it and see if you get increased travel. If so, you may need to have it checked out.
Read full answer
Feb 05, 2011 • Canon EF 100-400mm f/4.5-5.6 IS USM Lens
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Canon EF 70 -200mm F2.8L IS USM will not auto focus sometimes (using a 2x converter)
Check out the Canon guide for converters Some will not auto focus with a converter and you can only use manual focus
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Nov 28, 2010 • Canon EF 70-200mm f/2.8L IS USM Autofocus...
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18-55 lens not doing auto-focus
I offer you to buy Canon EF 24-105mm f/4 L IS USM Lens. This gives very good performance for your studio work and specially for portre. It has Image Stabilization and Ultrasonic Motor. Other professional lens are very expensive. It has red ring.
Please check the link below.
http://www.the-digital-picture.com/Reviews/Canon-EF-24-105mm-f-4-L-IS-USM-Lens-Review.aspx

Regards
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Apr 13, 2010 • Canon 28-135mm f/3.5-5.6 EF IS USM AF Lens
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Canon EF 75-300mm f/4-5.6 III USM Lens Auto focus motor keep working back and forth but lense is not able to stop on focus right. Had eror 01 also sometime with manual focus.
If your AF motor is hunting then the lens probably needs to be looked at. I wouldn't recommend this as something to do at home so you will need to either find a repair shop if it is out of warranty or return it to Canon if it is in warranty.
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Jan 17, 2010 • Canon 75-300mm f/4-5.6 III USM EF Lens
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My Canon 24 f/1.4 L USM doesn't focus when autofocussing on long distant objects. When I turn manually to infinity, it focusses on the (long distance) object. Is this a known issue or is it normal? If this...
It is a normal technical problem for Canon lens. But it will cost you about 200 euro to fix it. Good luck.
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Nov 22, 2009 • Canon 24mm f/1.4L EF USM Autofocus Lens
4helpful
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Focus with polarizing filter
No, the problem is not with the lens. Your Canon camera requires unpolarized light to focus. Even on manual focus, you may have trouble seeing focus through the viewfinder. That's why they invented circular polarizer.
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Sep 29, 2008 • Canon EF 70-300mm f/4.5-5.6 DOIS USM Lens
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Manual Focussing failure with Canon EF 100-400mm SLR zoom lens
I doubt if there is anything you can do yourself. The manual focus may have debris under the ring or is in need of parts. I would leave this one to a tech.
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Jan 22, 2008 • Cameras
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My 100-400 mm EF canon takes too long to auto focus.I like to take pictures of flying birds and i get alot of blurred pictures even at a shutter speed of 1/3200sec. I use the #2 position on the stabilzer...

  • Canon EF 100-400mm f/4.5-5.6 IS USM Lens

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