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My Canon EF-S 17-85mm f/4-5.6 IS USM lense, when zoomed out to 17mm is faulty. Different errors on different bodies.
EOS 400D body: error 99 "Shooting not possible. Turn power and again or replace battery"
EOS 7D body: error 01 "Communications between the camera and the lense is faulty. Clean the lense contacts"
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'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.
'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.
This is what the people at the canon tech support say to do for error 99
read this!! :)
The guy at tech support listened and then told me that the lens contacts were dirty and to 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 used a lens cloth and dabbed at the contacts rather than blow them so as not to blow the erasings inside the camera.
I did this to each of my three lenses just to be sure. Lo and behold, it worked
hope this works for you!!!! have a nice day!! :) :)
this lens has a design shortcoming in it's aperture's ribbon cable ,the cable will rupture after around 1 year using, this problem taken place in more than 60% of owners with this lens. Canon has no respons with it problem and ask you send to their quick fix store for repair.
Get the Canon EF 70-300mm IS USM about $500 and EFS 17-85mm IS USM about $300. The 75-300 all of them I would not use them 4 a body cap. Camera is fine or step up to XSI.
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.
By the way are these RAW images? What type of lense are you actually using, check this
EOS-1Ds Mark III EOS-1D Mark III EOS-1D Mark II N EOS-1Ds Mark II EOS-1D Mark II EOS-1Ds EOS-1D EOS 5D EOS 40D EOS 30D EOS DIGITAL REBEL XSi/EOS 450D EOS DIGITAL REBEL XTi/EOS 400D DIGITAL Compatible Lenses EF 14mm f/2.8L USM EF 28-70mm f/2.8L USM EF 14mm f/2.8L II USM EF 28-135mm f/3.5-5.6 IS USM EF 20mm f/2.8 USM EF 28-200mm f/3.5-5.6 EF 24mm f/1.4L USM EF 28-200mm f/3.5-5.6 USM EF 28mm f/1.8 USM EF 28-300mm f/3.5-5.6L IS USM EF 35mm f/1.4L USM EF 70-200mm f/2.8L USM EF 50mm f/1.2L USM EF 70-200mm f/4L USM EF 50mm f/1.4 USM EF 70-200mm f/2.8L IS USM EF 85mm f/1.2L USM EF 70-200mm f/4L IS USM EF 85mm f/1.2L II USM EF 100-400mm f/4.5-5.6L IS USM EF 100mm f/2.8 Macro USM EF-S 60mm f/2.8 Macro USM EF 135mm f/2L USM EF-S 10-22mm f/3.5-4.5 USM EF 180mm f/3.5L Macro USM EF-S 17-55mm f/2.8 IS USM EF 200mm f/2.8L USM EF-S 17-85mm f/4-5.6 USM EF 200mm f/2.8L II USM EF-S 18-55mm f/3.5-5.6 EF 16-35mm f/2.8L USM EF-S 18-55mm f/3.5-5.6 II EF 16-35mm f/2.8L II USM EF-S 18-55mm f/3.5-5.6 USM EF 17-35mm f/2.8L USM EF-S 18-55mm f/3.5-5.6 II USM EF 17-40mm f/4L USM EF-S 18-55mm f/3.5-5.6 IS EF 24-70mm f/2.8L USM EF-S 55-250mm f/4-5.6 IS EF 24-105mm f/4L IS USM -
You will get that error when using some lenses other than Canon. A lot of the older Sigma lenses have that issue. Do you get this error when using newer Canon EOS lenses?
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