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

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Error lens and camera body connection not good "clean contact"

While shooting the camera will not fire properly and I get an error on the display saying the connection between camera and lens is not good and to clean the contacts. I clean the contacts ...but this problem still persits. By trying other lenses I have worked it out that it is only this lens it happens with. Is this a repairable thing ...or am I looking at a new lens?

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Yes its the flex. Tony

Posted on Jun 04, 2010

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Most likely the flex to the power diaphragm is damaged and needs to be replaced.

Posted on Jun 02, 2010

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I have the same problem. With dissasembly i can see the broken flex cable and have ordered a replacement from ebay.
have a look at http://www.pbase.com/barry_2718/image/125765728

Posted on Jun 24, 2010

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1 Answer

Error 99 all the time , 1 yr old ...started it about 2 months after i bought it


Hum, error 99 eh? Canon's catch all error code, there is a ton of little entities that can cause error 99 from using third party lenses, batteries and even grips but, it all comes back to an electric contact fault. By using a good clean new pencil one with the red rubber eraser most of the error 99 problems can be quickly for lack of words erased. The most obvious problem area if you camera is not fitted with a battery grip is the lens contacts between it and the body of the camera.
Remove the lens, put the body cap on the camera when you are doing this part and while holding the lens as vertical as possible with the contacts down lightly rub the cold contacts. You can use a lens tissue and blow bulb/puffer to remove loose rubber. While you are at it clean all your lenses and put the rear lens cap on while not in use.
Okay the body, it's not as easy but doable, remove the body cap keeping the lens mount and open cavity pointing downward. Lightly rub the body contacts well but also gently, clean any rubber away from the contacts using a lens tissue. Don't use the bulb/puffer as it will blow eraser dust into the camera and possibly cause flecks of dirt to adhere to the sensor.
Once clean reinstall your lens and go do some photography.
Other things that cause this annoying error 99 are grip contacts, battery and recently I got into an error problem and my fix was updating to new camera firmware. That problem took me while on an assignment and would have been embarrassing except my back up was a "Rebel". Winding down the shoot the Rebel started with this error 99. Once back to the studio I did the updates and cleaned every lens I had. Cheers Happy New Year have fun make lots of pictures.

Jan 02, 2011 | Canon EOS Rebel XS 35mm SLR Camera

1 Answer

Lens shoots while aiming downwards, no while level or upwards


Sounds to me as if some of the electronic connections are not completing the circuit properly - have you tried cleaning the contacts on both the camera and the lens carefully with a lint-free cloth and some IPA ?

May 22, 2017 | Quantaray 135-400mm f/4.5-5.6 for Nikon AF

2 Answers

My cannon rebel eos DS6041 displays error 99 when


'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.

Jun 01, 2010 | Canon Digital Rebel / EOS-300D Digital...

1 Answer

Error 99


'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.

Jan 07, 2010 | Canon EOS 40D Digital Camera

1 Answer

Error 99


'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.

Aug 27, 2009 | Canon EOS 40D Digital Camera

1 Answer

F-- error displayed due to poor electrical connection (assumed)


Try cleaning the contacts on both the body and the lens with a cotton swab lightly dampened with rubbing alcohol.

Aug 13, 2009 | Nikon D90 Digital Camera with 18-105mm...

1 Answer

Error 11 at nikon camera


First, if you can try the lens on another camera body, please do. See if the same thing happens on a different camera body. If it does, it's a problem with the lens. If not, you need to look at the camera. You can verify it's the camera by placing a different lens onto the body and see if you're experiencing the same problem. If it is indeed the body, I would suggest you take a pencil eraser and gently but firmly clean the contacts located on the lens mount. It's my experience (I also shoot with a D200) that often times when a lens isn't autofocusing, it's due to direty contacts either on the lens itself or the camera body. Cleaning them is a good start though and will narrow your issues down to the lens or the camera body. After cleaning, try the lens again to see if it's working correctly. If not, send it to Nikon in New York for repairs.

Jul 11, 2009 | Nikon D200 Digital Camera with 18-200mm...

2 Answers

Error 99


the lens contacts are dirty - get a pencil with an eraser on the end, just a regular old pencil with a red rubber eraser. Detach the lens from the camera, hold it so that the lens’ gold contacts are pointing down and lightly erase their exposed surface, cleaning them of any hand oil that might have gotten on them. Do the same thing with the gold contacts inside the camera body. This is a bit harder but it’s doable: just hold camera so lens opening points down so no gunk falls in. Erase lightly. I've used a lens cloth and dabbed at the contacts rather than blow them so as not to blow the erasings inside the camera.
Works well for me....let me know how you fair!

Mar 16, 2009 | Canon EOS 40D Digital Camera with 17-85mm...

1 Answer

Camera will not shoot a picture


The F-- error means the Auto Focus in the lens can't communicate with the CPU in the camera. Because you also have problems with the flash not popping up, I'm not optimistic that you can fix this yourself. Odds are high that you will need to send it in for repair.

The F-- error could be caused by many things. First, try removing and replacing the lens - the contacts between the lens and the camera may not be connected properly. Also try shutting the camera off and removing the battery, then replacing the battery and turning the camera back on (rebooting the camera) as this sometimes helps. If neither of these help, the next step is to remove the lens and carefully (CAREFULLY) clean the contacts on both the lens and the camera. Gently rub the contacts with a clean pencil eraser and hold the item upside down over a table so that any debris from the eraser will fall onto the table rather than into the camera or lens.

If none of these fix the F-- error then you may have a hardware failure in the camera body itself. If so, the only fix is to send it in for repair - you can't access the interior parts of the camera without special tools that only the repair facility has.


Dec 18, 2008 | Nikon Cameras

1 Answer

Error 99 on screen with the 18-55mm lense only


'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.

Dec 03, 2008 | Canon Rebel XT / EOS 350D Digital Camera

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