Question about Canon Rebel XT / EOS 350D Digital Camera

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Autofocus is not working in Canon 450d

My camera (Canon 450d) does not allow me to take picture in a auto setting. However, it works fine when i turn the setting to manual focus. What should i do to fix this problem?

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6 Suggested Answers

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Posted on Jan 02, 2017

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SOURCE: My Canon digital rebel will not autofocus correctly.

I had this problem awhile ago - you must have accidently adjusted the focal area - it is sooooo easy to do without realising it. Here is what I was told:
**************************

Most likely, you have changed the AF point, which only takes effect in the creative modes (Manual, Av, Tv, P, etc)

There should be a button on your camera that has a grid like pattern above it, like
-
- - - - -
-

or so. press that, look through the viewfinder, and move the shutter or rear wheel, you should see the different AF points like up in red, and as you turn different ones will light up, and eventually all of them. also, you can look on the screen on top (or back, if its a rebel) and it will show you which ones are selected while in that mode, instead of looking through the viewfinder.

Posted on Dec 07, 2007

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SOURCE: Canon digital camera will not focus

Check your diopter adjustment. It should be a small wheel on the upper right of the viewfinder. It is designed so that people who normally wear eyeglasses can use the viewfinder without their glasses, but it can occasionally get bumped. If the diopter adjustment is way off, it is like looking through someone else's eyeglasses!

Posted on Mar 18, 2008

SOURCE: Canon 450d Auto focus has

Check if you haven't accidentaly disabled the liveview autofocus function - customer function III must not be set to 0. Use 2 for best results (focusing on sensor rather than autofocus chip). Also autofocusing in liveview is done by the * (star) button, upper right corner of the back of the body.

Posted on Aug 19, 2008

  • 1 Answer

SOURCE: Canon Rebel Xti Wont autofocus

I dropped my camera and thought the autofocus broke. It turn out that it swithed from autofocus to manual focus. There's a switch on the lens. Check if that's your problem too.

Posted on Apr 08, 2009

  • 155 Answers

SOURCE: Canon 450D, ERROR 99 only when flash pops up

Err 99 usually means your lens contacts are dirty either on the lens itself or on the camera.

To isolate the cause of the issue, do the following: -
1. Turn off the camera.
2. Remove the lens, battery, and CF card.
3. Allow the camera to sit without power for approximately 20 minutes.
4. Insert only a fully charged battery, and turn on the camera.
5. Depress the shutter button as you would to take a picture.

Does the “ERR 99" message appear? If so, the camera may be faulty and requires a service. If it does not, then: -
1. Turn off the camera.
2. Insert the CF card.
3. Turn on the camera.
4. Format the CF card in the camera.
5. Depress the shutter button as you would to take a picture.

Does the “ERR 99" message appear? If so, then the CF card is faulty. Try a different card. If the message does not appear: -
1. Turn off the camera.
2. Clean the gold contacts on the lens by GENTLY rubbing them with a pencil eraser or soft cloth. Keeping the camera face pointing down, also clean the gold contacts on the camera, being careful that you do not let any debris fall into the camera body.
3. Reattach your lens.
4. Turn on the camera.
5. Depress the shutter button as you would to take a picture.

If the “ERR 99" message only appears when one particular lens is attached, then that lens should be examined by a service technician.
If you see the “ERR 99" with a different Canon lens attached, then the camera is faulty and should be serviced.

Posted on Apr 09, 2009

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Canon 450d lcd will not turn on at all, viewfinder says busy, and camera will not take pictures


In menu option C.Fn-12 you can choose to switch the display off (or on) when you switch on the camera. The display stays off even if you switch of and on the camera.
Press the button <DISP> and switch off the camera, while the settings for recording are on the screen. After you switch on the camera, the LCD screen will be switched on again.
Please refer toy your english manual, I had to translate, because I don't have the English version.

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use the multi card reader copy and paste all files to your picture file. Use the canon software to handle the raw file.

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Use a card reader to download your pictures to a folder you create on your desktop.

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Check whether there is anything obstructing the range sensor just above the rear LCD. The sensor could be thinking that your face is near, thus turning off the display. Also, you should be able to use the Disp button even in auto display mode, which might make the display not show anything by default.

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2 Answers

Canon 450D, ERROR 99 only when flash pops up


Err 99 usually means your lens contacts are dirty either on the lens itself or on the camera.

To isolate the cause of the issue, do the following: -
1. Turn off the camera.
2. Remove the lens, battery, and CF card.
3. Allow the camera to sit without power for approximately 20 minutes.
4. Insert only a fully charged battery, and turn on the camera.
5. Depress the shutter button as you would to take a picture.

Does the “ERR 99" message appear? If so, the camera may be faulty and requires a service. If it does not, then: -
1. Turn off the camera.
2. Insert the CF card.
3. Turn on the camera.
4. Format the CF card in the camera.
5. Depress the shutter button as you would to take a picture.

Does the “ERR 99" message appear? If so, then the CF card is faulty. Try a different card. If the message does not appear: -
1. Turn off the camera.
2. Clean the gold contacts on the lens by GENTLY rubbing them with a pencil eraser or soft cloth. Keeping the camera face pointing down, also clean the gold contacts on the camera, being careful that you do not let any debris fall into the camera body.
3. Reattach your lens.
4. Turn on the camera.
5. Depress the shutter button as you would to take a picture.

If the “ERR 99" message only appears when one particular lens is attached, then that lens should be examined by a service technician.
If you see the “ERR 99" with a different Canon lens attached, then the camera is faulty and should be serviced.

Mar 31, 2009 | Canon Rebel XT / EOS 350D Digital Camera

4 Answers

Canon 450d Auto focus has stopped working in Live view mode


Check if the customer function III was not disabled by accident - set it to 2 (live mode) for best results. Also, autofocus in liveview mode is activated by the * (star) button (upper right corner of the back of the camera body), not the shutter release button.

May 23, 2008 | Cameras

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