Question about Canon EF-S 17-55 f/2.8 IS USM Lens

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00 on the F info (aperture shows 00)

The lenshave perfect contacts (absolutly remarkable) and the lens quite often stop working, showing 00 as aperture size.already tryed it in 3 diferent canon bodys (2 eos 20d and a 450d)
same problem.

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  • 73 Answers

I'll assume the lens is an AF lens? Most of the new Canon bodies require AF contacts. If there isn't the right contacts, it won't work. There are suppose to be AF body mounts that will tell the body that there is an AF lens, then use the old lens in Auto mode.
If it's an AF lens, the internal electronics are toast. You could send it out, but they'll charge you a "look at" fee. That could run into many bucks. Give Canon a call.

Posted on Jul 27, 2009

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Posted on Jan 02, 2017

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I have a Nikon D60 and have just bought a 50mm AF 1.8 D lens but find I can only use the aperture setting at 22. Is that right ?? why can't I use the other aperture settings ??


The D60 camera sets and triggers the aperture that you have selected (or the camera has selected if in auto mode) and sets the aperture as you take the picture. Moving the aperture ring on the lens will not work, in fact once you move it from the f22 position the camera will stop or possible show and error. on my older Nikon AF lenses there is a small lock to lock the aperture ring in the lowest position when mounted on a digital camera, it is found near the f2.8 side of the aperture ring. when you want to set the apertures manually, you put the camera in aperture or manual mode and set the aperture you want by moving the the rotating wheel on the grip part of the camera. the aperture you select will show in the window, you do not have to move the ring on the lens,it must remain the f22(highest numerical) position.

Oct 24, 2010 | Nikon Normal AF Nikkor 50mm f/1.8D...

1 Answer

Can't adjust aperature in manual mode.


1. Check the power switch is pointing to the rear dial (not "ON") or you wont be able to set your aperture.
2. Try shooting one image for each position of the mode dial on the top. Then review each image to see what mode the camera indicates the image was taken.(Pressing info during playback will bring up detailed information to show this) If the recorded setting and actual setting dont match, this indicates a fault with the dial.
3. If the camera does not display an aperture, or shows "00" then there is a communication fault with the lens. Check the contacts are clean and sitting correctly. You can confirm this lens is at fault by trying another lens on your camera,I'm sure a photo store could help with this.
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Apr 05, 2009 | Canon EOS-20D Digital Camera

1 Answer

My Aperture shows 00 in my digital display and no auto focus


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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

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


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

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

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.

May 23, 2007 | Canon Zoom Telephoto EF 100-400mm...

1 Answer

"00" Apparture


If an aperture of "00" is displayed on the camera's LCD panel, perform the following steps in order. Check after each step to see if the problem remains, and proceed to the next step if it does. (In some cases, you may see "Err 01" displayed on the LCD panel.) 1. Check if the lens is correctly mounted on the camera. If no lens is attached to the camera, "00" will be displayed for the aperture value. 2. Clean the lens contacts. Turn the camera's power switch to OFF, and then detach the lens from the camera to clean the contacts. Use a blower to blow away dust on the lens. Do not touch both the camera's or lens' electrical contacts with your fingers while cleaning the lens. Turn the power switch to ON again and check the aperture value displayed on the LCD panel. Refer to the Instruction Manual provided with your camera for instructions for detaching or mounting the lens. Also, prevent any foreign materials or dust from getting into the camera through the lens mount, and be sure not to damage the contacts. 3. Remove the battery pack. Turn the camera's power switch to OFF and remove the battery pack. Then reinsert the battery pack, and then turn the power switch to ON again.

Aug 29, 2005 | Canon EOS-1D Mark II Digital Camera

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