Question about Canon EF-S 17-85MM F/4-5.6 IS USM Lens

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Lens won't allow me to change aperture & several other functions on camera

Tried to take photos today with Canon EF-S 17-85MM F/4-5.6 IS USM lens on Canon 40D, aperture reads 00, can't use aperture priority mode as won't change from 00, displays 00 in all modes including the Fully Auto mode, cannot change AF modes nor drive modes while this lens is on. I used another lens and it works as it should. I will try cleaning the contacts but what else could it be? Only 6 months old.

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Very likely is the lens aperture diaphragm faulty. Need to sent back to Canon.

Posted on May 13, 2009

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The USM engine may be out of order, or there is a bad contact in the lens.

Posted on Feb 04, 2009

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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.

Posted on Dec 11, 2008

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Err 01 message when photos taken in bright light. no problem in low light????


The flat printed cables inside the lens that connects to the aperture diaphragm unfortunately develops small cracks over the years and this causes the lens to fail.

The repair is NOT easy, you have to tear down the lens all the way to it's base components and replace the flex cable on the aperture diaphragm. The cable and the diaphragm are available online, but again it's not a simple repair and most people should not attempt it themselves.

Thomas Drayton
Owner Darntoothysam com

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Item: Canon EF-S 17-85mm 1:4-5.6 IS USM Camera: Canon 20D Problem: At a focal length of below 35mm with the aperture set smaller than f4.0 in any programme mode an Err 99 appears in the view finder,and...


Check this article which will lead you through diagnosing the problem and a possible fix.

http://www.richardsnotes.org/archives/2005/04/29/50mm-lens-contact-points/

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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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Canon Zoom Lens EF-S 17-85mm 1:4-5.6 USM: I


I hate to re-invent the wheel (and I don't want to cut 'n paste someone else's hard work to present as my own) so please click here for a likely practical solution which usually works and for Canon's own suggestions on the error 99 fault.

If this has assisted you then please rate my answer; if not then add a comment to provide feedback and I'll attempt to provide an alternative solution.

Mar 01, 2010 | Canon EF-S 17-85MM F/4-5.6 IS USM Lens

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There are several things it could be. Send it in for service is your best bet.

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You are correct in thinking that it should be possible to set the aperture wider than f/5.6 at the wide end of the zoom range.  My best guess is that the lens is defective.  I'd suggest returning it for a replacement.

Dec 21, 2008 | Canon EF-S 17-85MM F/4-5.6 IS USM Lens

1 Answer

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.

Oct 11, 2008 | Canon EF-S 17-85MM F/4-5.6 IS USM Lens

1 Answer

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I disassembling my canon eos kiss body my self.

I used some pictures given by Google search. Did u try that??

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1 Answer

Lens stops functioning


Have you tried this same lens with other cameras? Do you have another camera body you can try? or perhaps a friend with a Canon EOS Camera? Also try the following please: Remove the lens. Look at the lens mount contacts, take a Cotton swap with some rubbing Alchol & clean the contacts very well, both on the lens and the camera body. Is your camera reading the lens aperture range correctly (at least most of the time)? Also since you replaced the PCB on the lens, isn't it under warranty? Let me know if this works. Thank you, AJ.

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