Question about Canon EF 24-70mm f/2.8L USM Lens

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Need stop screw for canon lens (24-70mm f2.8)

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  • 121 Answers

You need to get this part from a Canon repair facility. If the lens is still under warranty, your best bet is to send it in for warranty service. If it isn't under warranty, you can send it in for "cleaning" and "service" - they should replace the missing screw as part of this routine service.

Posted on Jan 05, 2009

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Posted on Jan 02, 2017

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Canon 17-85 IS zoom ring locked at 17mm.


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Canon 24-70MM 2.8 lens screw housing damaged


With a lens of this quality its worth checking whether it's repairable. try Protech, Uckfield for an estimate

Mar 15, 2010 | Canon EF 24-70mm f/2.8L USM Lens

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My Canon EFS 17-85 MM is locked at the 17 MM position (although it doesn't have a "locked" feature. What is the problem?


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3 Answers

17-85MM IS - mechanically stuck at 17mm - will not zoom -


Hi all,

I've had the same problem. So I decided to give it a try because I didn't find any solutions on the net. Unfortunately you have to pay pretty much for a Canon lens while the internal quality is pretty cheap, the whole mechanism is of plastic and this is also the problem. And after a while some screws will vibrate loose from the plastic components and canon could have done this better.

Probably within your lens is now one of the three zoom mechanism screws complete removed and you will notice that there is some abnormal movement in the zoom part. Unfortunately these screws are deeply mounted inside the lens and you need a lots of skill and patience to get it fixed.


First you need to completely disassemble the lens, and please make a picture of your lens after every step you make because I had to disassemble my lens 4 times! Because some of the elements was not right in place.

I will try to place a more complete description later today including some pictures.

Regards Gert


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1 Answer

I have a Canon EF 300mm f/2.8L USM Lens


Here is a link to many Canon products in PDF form: Canon Parts Lists


Unfortunately, the only 300mm 2.8 lens listed is the IS version

The procedure is not that complicated, but you need to pay attention to the connections on the circuit board. The mount is removed, and you need to remove the small screws that hold the connector board to the mount ring first.

I cannot do live chat due to I use a Mac, but I will monitor the thread if you have questions,

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2 Answers

Lens canon 28-135 IS


Need to open Lens?

1. Front Lens Cap- press the two side taps in and pull out.
Rear Lens Cap- twist and pull out.

2. Remove and Repair: Small Phillip Screwdrivers, gloves and mask.

From the rear, the electrical contacts- remove all those
screws. Some screws are locked with clue. Pinch black
plastic ring that is part of those contacts and gently remove out.
Don't brake the electrical contact ribbon cable.

Good lock.
atdlee@netzero.com
at

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