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

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Canon EF-S 17-85MM F/4-5.6 IS, Canon 28-300 L IS

Hi, have been getting intermittant error 99 during shooting with both lenses. Only after removing lens and battery several time does the problem dissapear, only to surface on the next shoot. It seems to happen when I take the first few shots on a job. Ant advice? I have downlaoded firmware version 2.0.3

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You will have to refer to Canon re this - it possible the firmware update did not take or was the wrong one.

Posted on Apr 24, 2008

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Hi there I have recntly purchased a Canon 15m EF fish eye lense which I have used on a Canon 450d + 350d body. On the 350d I get an error 99 code and on the 450d get a 01 error code. This leads me...


Rob, Error 99 is Canon's catch all error code, yes my first impression would also have been to clean the contacts but something else that is happening is the camera firmware may need to be updated to handle that particular lens. Camera updates are free on the Canon site and actually can solve a lot of hidden processing problems.

That lens isn't really suitable for your 450d as it's an APS-C sensor size with a 1.6 crop focal factor which will give you more like a 24mm focal length.

You may also want to format the memory card and clean your battery terminals both the battery and the contacts in the battery compartment.

Best little cleaning item for cleaning contacts is a pencil eraser (new) lens contacts or battery something about the soft rubber cleaning off the most suborn dirt and electrolysis.

Don't use a "used" eraser obviously it will transfer the dirt to the contacts over removing what you want.

Hope these techniques work they have for me

Feb 21, 2011 | Canon 15mm f/2.8 FD Lens

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Error 99 and jerky fixation of focus between 17 and approxinately 30 mm works perfectly at zoom lengths beyond this with normal rapid fix of focus and records image normally. the error and failure to...


'Error 99' indicates some problem with the AF contacts. This is a common error in Canon lenses. It could indicate a very simple problem like dirty contacts or a much serious one like the breakage of USM cable.
As a first step, you can try cleaning the lens and body contacts (the metal contacts between the lens and body) using a pencil eraser. Be careful to hold the body facing down so that no dust falls inside. After cleaning both the lens and the body contacts, re-attach the lens and try shooting. If the AF does not work still, you need to take the lens to an authorized service center.
For the jerky focusing ring, you need to get the lens serviced by an authorized service center.

Aug 28, 2010 | Canon EF-S 17-85MM F/4-5.6 IS USM Lens

1 Answer

I dropped the lens and now get error 99 when trying to use it.


Probably cracked an internal circuit board on the lens- not an item you can easily repair yourself

May 12, 2010 | Canon EF-S 18-55mm f/3.5-5.6 USN Lens

2 Answers

Lens not communicating with camera


contact problem or lens diaphram blades problem. First try to clean the contact with the pencil eraser. If the problem isn't solved. send it to canon it should cost you about 100.00 to repar.

Mar 14, 2010 | Canon EF-S 17-85MM F/4-5.6 IS USM Lens

2 Answers

EF-S 17-85 AF jumping around causind err 99


The AF motor is hunting. Clean the contacts on the end of the lens and the camera body with a pencil eraser and try again.

Jan 20, 2010 | Canon Cameras

1 Answer

My canon EF-S 17-85 IS USM lens will cause an error 99 when in wide angles at 35mm or less. The iris closes but will not open until I "re-boot" the camera. Other lenses work fine on the camera and the...


Zborn, did you find any solutions? I have had same lense for 2-3 years, taken maybe 10000 shots and just yesterday started to get error 99. Spent most of today trouble-shooting to repeat problem and it seems that when I set to less than 35mm I get the error 99. other settings and my other lense has no problems.

Dec 18, 2009 | Canon EF-S 17-85MM F/4-5.6 IS USM Lens

2 Answers

Err 01 during slow shutter speed shooting


I having a similar problem and send back to the Canon service centre for repair. Subsequently, it was confirmed that the aperture diaphragm is faulty and need to be replaced.

Dec 02, 2008 | Canon EF-S 17-85MM F/4-5.6 IS USM Lens

2 Answers

Error 99


Assuming that other lenses function normally on the camera, the "Err 99" can be caused by a failure of the aperture component in the lens. Error 99 is a generic error, so unfortunately it does not indicate exactly what is wrong. There are other factors that can cause the failure, but there is a good chance that the aperture is not functioning correctly. You can try cleaning the electrical contacts on the lens, if this does not work you may need to get the lens serviced. Check with Canon, or check the web for other repair service providers. David Millier Advance Camera Repair

Mar 05, 2007 | Canon EF-S 17-85MM F/4-5.6 IS USM Lens

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