Question about Canon EOS 40D Digital Camera

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Canon 40D Auto focus not working.

Hello, I have a Canon 40D. I used it yesterday and the auto-focus seemed to freeze. I'd press the shutter down halfway and it wouldn't take the picture. After I took the battery out, it seemed to fix the problem......but, I don't want it to happen again. Any answers? Thanks.

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  • druce h Mar 16, 2009

    I had exactly the same problem. I tried your solution of taking the batteryout and putting it back. That fixed it. What is going on ?

  • molnarzoli May 08, 2009

    I press the shutter button halfway down but my lens is not responding. happened already with 2 lenses, after turning the focus ring manually starts to focus again. but the problem is happening too often to be ignored.

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5 Suggested Answers

SOURCE: Nikon D40X stopped auto-focusing yesterday

I too have the same auto focus issue. But the problem is intermittent.
Called Nikon today. They suggest:
- call when the camera is acting up
- be ready to give them the serial number

Apparently they are available 24 x 7 and will troubleshoot over the phone...

Posted on Mar 11, 2008

  • 203 Answers

SOURCE: cybershot H7 focus problem

Things to check before you assume it is a mechanical issue-you can get vibration message if flash is disabled, be sure also that the macro mode is not enabled-this is very common on sony cameras to turn on by accident-flower button on camera will put in close up mode and you will get blur make sure no flower is present on lcd screen-if in macro press button on camera w/flower to turn off-also in menu you have continuous and monitor auto focus settings try changing one or the other and see what happens

Posted on May 09, 2008

  • 1 Answer

SOURCE: nikon d40 autofocus

Look on the left side of the lens. Make sure the button is on A for auto focus and not M for manual. OR not stuck in the middle. Hopefully that will solve the problem.

Posted on Jul 21, 2008

  • 2 Answers

SOURCE: Canon 40D not firing

Try doing a reset in the camera tools somewhere, this fixed a similar problem I had.

Posted on Feb 06, 2009

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Was shooting full length portraits and my Canon D40 seemed to randomly auto focus on various parts of the image...I would like the entire image in focus...do you think I have a setting wrong .. I am...


Hi Judee,

It is about adjusting the settings.

Click on the link below and watch the video to know more detailed information about your Camera

Click here - > Canon 40D Video

Regards,
Suhail

May 16, 2012 | Canon EOS 40D Digital Camera

1 Answer

Will not release shutter on canon 40D


Cannon is notorious for their auto focus and automatic setting to be very discriminant. If you are to close to your subject while in these settings granted your strobe will fire and your flash may flip into position but the shutter just wont work. Cannon is trying to tell you you are too close. You need to back up. If you are trying to get that close up and don't have the proper lens that's all you are going to get.
It is best to go long lens then go for your close up.

Mar 09, 2010 | Canon EOS 40D Digital SLR Camera Digital...

2 Answers

40D turns off as I press shutter button


The shutter mechanism had to be replaced. I've heard that this is a typical 40D problem, due to a shutter design flaw. They say that it has been fixed on replacement shutters.

Jul 26, 2009 | Canon EOS 40D Digital Camera

1 Answer

Lost autofocus on 40D when using ST-E2 and 2 580EX


Try taking the battery out and putting it back in. If that doesn't work try cleaning the len's contact sesnors with a pencil eraser.

Jun 23, 2009 | Canon EOS 40D Digital Camera

1 Answer

Camera turns off when pressing shutter button


Sounds like a compatability problem. If available, try a genuine Canon battery new and fully charged.

Jun 09, 2009 | Canon EOS 40D Digital Camera

1 Answer

Auto focus not working


The lens AF mode is not working. What lens is it you are using?

It is not a camera issue but a lens issue. Try a different lens to be certain.

Jun 08, 2009 | Canon EOS 40D Digital Camera

1 Answer

Shutter needs to be pressed twice in creative zone?


Your camera could be enabled for Mirror Lock-Up, thus needing two presses of the shutter to shoot - first press to lock mirror up till vibration dissipates, second press to activate shutter.

In the menu, go to C.Fn III: Auto Focus/Drive, #7 - turn that off/disable.

May 25, 2009 | Canon EOS 40D Digital Camera

1 Answer

Canon 40D not firing


Try doing a reset in the camera tools somewhere, this fixed a similar problem I had.

Jan 07, 2009 | Canon EOS 40D Digital Camera

2 Answers

Canon EOS 40D not working when turned on


I'm sorry to tell you this but you do NOT have anything set wrong. To test my theory turn your camera to full auto. Next make sure your switch on the lens is set to auto. Then just try taking some shots of some objects across the room. If that doesn't allow you to take pictures do the exact same test with a different lens. That way you've taken the lens out of the equation. Sorry I couldn't give you a better answer but I'm pretty sure you'll need to return the camera to cannon.

Dec 28, 2008 | Canon EOS 40D Digital Camera

3 Answers

Nikon D40X stopped auto-focusing yesterday


I had the same problem. My issue was with all my lenses. I solved it by going to the menu and selecting the custom setting menu (pencil icon). Then from the right menu select the AE-L/AF-L and press OK. Then make sure it is set on AE/AF Lock. Presto...all my lenses worked on auto-focus.

Feb 24, 2008 | Nikon D40x Digital Camera

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