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

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What is wrong with my 100 - 400 canon lens, it seems to jump when I try to focus

Posted by Anonymous on

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4 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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  • 30 Answers

SOURCE: my canon eos rebel xt 350d wont focus

change your manual settings

Posted on Oct 11, 2009

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SOURCE: canon 50mm f/1.8 lens is not focusing.

I had the same problem with my ef 50mm 1.8. I used it on a cold day and broke off one of the internal gears. I used it for almost a year before I got the guts to take it apart and fix it. There are instructions online on how to take it apart, scary at first but not that hard overall. I used a small drop of crazy glue on the gear, put it all back together and just like new.

Posted on Sep 18, 2010

dR-deviL
  • 258 Answers

SOURCE: Canon 7D -I have my setting on one shot - in any

it means the lens is about to die.
i get same problem with my nikon 18-55 mm lens. the solution for my problem was that i shift from autofocus to manual focus on the llens and then back to autofucus. the lens works fine for me then :P
u can try the same thing.

Posted on Mar 02, 2011

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1 Answer

Canon Ef_S 18-55mm f/3.5-5.6 Lens won't focus in manual or auto mode


If the camera is used you may have a problem with the seller. Before jumping into conclusions however read your manual for your solution or simply search youtube for a help video. Hopefully this helped.

Feb 14, 2014 | Canon EF-S 18-55mm f/3.5-5.6 USN Lens

1 Answer

Canon 7D -I have my setting on one shot - in any mode.- Lens: Canon 17-85mm. The autofocus jumps back and forth no matter where I focus at.


it means the lens is about to die.
i get same problem with my nikon 18-55 mm lens. the solution for my problem was that i shift from autofocus to manual focus on the llens and then back to autofucus. the lens works fine for me then :P
u can try the same thing.

Mar 02, 2011 | Canon EF-S 17-85MM F/4-5.6 IS USM Lens

3 Answers

Cannot auto focus


It sounds like the circuit board flex has gone bad, It folds back and forth when you zoom the lens, And needs to be replaced by a repair shop and readjusted. Tony

May 26, 2010 | Canon 28-135mm f/3.5-5.6 EF IS USM AF Lens

1 Answer

Canon 75-300mm USM III, was initially working fine


Hi
you seemed to have a problem with the camera (auto-focus) mode. I suggest you try shooting in manual focus only but consider taking it to a canon service outlet for proper checks and service as a long-term solution.

Apr 04, 2017 | Canon Zoom Telephoto EF 75-300mm f/4.0-5.6...

1 Answer

I have a Canon 20D camera that I use with two lenses. The lens that I have most of my problems with is the 28-70 f2.8 red ring lens. When focusing It always seems to focus on what is behind the subject. No...


This is quite a well known problem called 'back focusing' there is little that can really be done about it, except if the camera is under warrnty you can send it in and they will do some laser alignment that fixes the problem, it would be worth a call to canon and getting a price quote on a service. Also it seems to be worse with some particuar lenses,

Cheers

Emmanuel

Sep 12, 2008 | Canon Cameras

3 Answers

Autofocus jumps around and often will not settle on the correct setting


what i do is usually put it onto manual focus then back to auto focus, what it may be is that you are using the wrong lens for your subject :/

Feb 27, 2008 | Canon Rebel XT / EOS 350D Digital Camera

2 Answers

Pics not clear


first have you changed the batteries, next go into your menu and put everything back to reset the any changes that you have made or better known at default. Good luck. Let me know if this is helpfull

Dec 03, 2007 | Canon Digital Rebel XT / EOS 350D Digital...

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