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New Contributor
Posts: 2
Registered: ‎08-26-2017

Dead focus spot on EF-S 18-55 mm IS II

I'm having auto focus problems with my  EF-S 18-55 mm IS II lens, typically at about 24 mm.

 

When I press the shutter halfway, the camera will intermittently not focus (no red indicator on one of more auto focus points and no motor movement), this typically happens when the lens is at about 24 mm.  Sometimes I can get it to focus by zooming in and out by adjusting the focal length by turning the lens barrel.

 

I know this is an entry level lens and is probably cheaper to replace the lens vs getting it repaired by a shop.Is there anything that can be done to address this condition (I'm handy and do not have much to lose by trying to fix it myself...)

 

Any clue as to the problem? 

 

thanx, mark

Honored Contributor
Posts: 5,030
Registered: ‎08-13-2015

Re: Dead focus spot on EF-S 18-55 mm IS II


mkyp wrote:

I'm having auto focus problems with my  EF-S 18-55 mm IS II lens, typically at about 24 mm.

 

When I press the shutter halfway, the camera will intermittently not focus (no red indicator on one of more auto focus points and no motor movement), this typically happens when the lens is at about 24 mm.  Sometimes I can get it to focus by zooming in and out by adjusting the focal length by turning the lens barrel.

 

I know this is an entry level lens and is probably cheaper to replace the lens vs getting it repaired by a shop.Is there anything that can be done to address this condition (I'm handy and do not have much to lose by trying to fix it myself...)

 

Any clue as to the problem? 

 

thanx, mark


You are correct.  If the lens is broken, it is not worth the cost of repair.  The lens does not have "manual focus override" which means you can turn the focus ring while the AF/MF lens switch is in the AF position.  Doing so jams the AF motors, which causes the lens not to focus at all.

It is all too easy to be looking through the viewfinder, reach up to adjust the zoom ring, but turn the focus ring, instead.  Your description is one that I have never heard before, that it won't focus at just a certain focal length.  

 

Not focusing can be caused any one of a half dozen reasons.  For example, there may not be sufficient light for the camera's AF sensor to properly focus.  Or, the subject is too close to the lens to bring the subject into focus.

Buying the STM version of the lens will be a big improvement in image quality, AND the lens has MF Override.

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"I don't rent software. I use Photoshop CS6, ACR 9.8 and Lightroom 6.8 ."
Esteemed Contributor
Posts: 3,500
Registered: ‎06-25-2014

Re: Dead focus spot on EF-S 18-55 mm IS II


mkyp wrote:

I'm having auto focus problems with my  EF-S 18-55 mm IS II lens, typically at about 24 mm.

 

When I press the shutter halfway, the camera will intermittently not focus (no red indicator on one of more auto focus points and no motor movement), this typically happens when the lens is at about 24 mm.  Sometimes I can get it to focus by zooming in and out by adjusting the focal length by turning the lens barrel.

 

I know this is an entry level lens and is probably cheaper to replace the lens vs getting it repaired by a shop.Is there anything that can be done to address this condition (I'm handy and do not have much to lose by trying to fix it myself...)

 

Any clue as to the problem? 

 

thanx, mark


Focus points are a feature of the camera, not of the lens. If the inability to focus really is manifest only at a specific focus point, with all else equal, the fault is in the camera.

Bob
Boston, Massachusetts USA
Honored Contributor
Posts: 7,910
Registered: ‎12-07-2012

Re: Dead focus spot on EF-S 18-55 mm IS II

Robert is correct.  Cameras AF.  Lenses do not, they have no idea where they are in the focus arena!

 The bestest, mostest, easyest way is to try it on a different camera.  Smiley Happy

A lot of Canon stuff. Along with, a lot of other stuff.
New Contributor
Posts: 2
Registered: ‎08-26-2017

Re: Dead focus spot on EF-S 18-55 mm IS II

I tried it on another camera and got the same behavior.  Also tried a differnet lens of the same type on my camera and it worked fine. So the  isue is with the lens.

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Honored Contributor
Posts: 7,910
Registered: ‎12-07-2012

Re: Dead focus spot on EF-S 18-55 mm IS II

Sorry but you answered your question. 

A lot of Canon stuff. Along with, a lot of other stuff.
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