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

2 Answers

Hard to extend zoom

My lens does not extend easily from 24-70mm without me exerting a great deal of strength. Any way it could be jammed? Any solution to loosening it up?



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  • Biggsman Feb 23, 2008

    My bad! It's a Canon L series 24-70 lens (excellent lens apart from this problem- -superb images) and I use this on a Canon 5D and Canon Xti


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Hate to say it, but unless you have a bunch of experience with lens assemblies, your best bet would be to take it to a camera or photography shop to have them look at it. You need the right sized spanners and such for disassembly. There are also a number of considerations to be taken into account when reassembling them. They shouldn't charge for looking at it and can give you an idea as to what it would cost to have them fix it. From what you've told us, it sounds like it's gummed up and may just need to be cleaned.

Posted on Feb 23, 2008

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Can you let me know the camera model?

Posted on Feb 23, 2008

  • eagle338
    eagle338 Feb 23, 2008

    Ok. . Can you hear loud noise from the zoom motor even while zooming it slowly or its normal? One more thing you would want to know is that An unusual aspect of the 24-70mm f/2.8L (and 28-70mm f/2.8L) is that its barrel extends as it zooms toward its shortest focal length. This can increase the zoom time a little bit further.If you still think it has not acted like this before, then this is a problem with the zooming mechanism.Since the lens has got dust protection cover its an internal problem with the zooming mechanism itself. I can give you instructions for taking it apart and fixing it but its risky. I storngly advice to get it replaced for a new piece if its under warranty.
    PS: If you still want instructions about trying to fix it yourself i will give them to you.
    Eagle 338.


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