Question about Canon EOS 450D Digital Camera

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My Canon EOS 450D shows busy while trying to click on AF auto mode and it does not click at all.

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There are several contributing factors to this problem and I'll try to list a few that may be the cause.
All Canon EOS camera auto focus modes us contrast to focus this means simply that no contrast there is no focus. There is a small green dot in the lower right corner of the viewfinder that will come on and stay on solid when auto focus as been achieved. By default the shutter will not operate "click" if auto focus has not been made.

Here are a few examples of where auto focus will ether search (focus back and forth) or fail completely.

A solid painted wall, glass between the camera and subject, mirror, chrome, any large body of water, clear sky. Another place you wouldn't expect is clear skin in your subjects face or body.

Cameras with multiple focus points and set to other then the middle will have a problem if the photographer is still attempting to use the center focus point.

Look for the green dot in the lower right corner of the viewfinder that's your focus confirmation.

Posted on Apr 12, 2011

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Try removing the lens with the camera off and re-mounting it. Before doing so, check to make sure the contacts on the lens and camera body are clean and not damaged. If that doesn't help try gently pressing on the front of the lens (not the glass) while pushing the shutter release button half way down and if it works then you've got a poor fit between the lens and camera body.

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EOS 450D/18-55 IS, problems with AF Hi all. I am using a Canon EOS 450D, 2 years, with standard 18-55 IS lens kit. Yeasterday a friend shoot a lot of fotos indoor, with the incorp flash, once outside I...


Hello,

I had a similar focus problem with a Tamron 70-300 for canon. What can i tell you is that if you o not have experience in this domain you should NOT disassemble the lens because you will have a very hard time to put it back together. Also, it's very hard to allign all the glass lens inside and you may end up in making it worse.
As I see this, you have 2 options:
Either you learn using the camera in Manual Focus mode, which is not a bad idea, in time you cn become faster than the AF :)
or
you can try to find a shop that sells cameras, they may direct you to a service, it does not have to be canon but must be a person with a technical background in cameras and such.

Regards,
katharsys_i

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1 Answer

Canon EOS 450d not clicking on AF mode


this may have to do with the lens rather than the camera, try swapping the lens with another one and see if the same problem happens in AF mode with the new, borrowed lens, also remove lens and check that the gold connector between the two are clean carefully wipe with a dry q tip but be careful not to allow dirt to fall into camera body.

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Change the AF mode from AI+Servo to One Shot and see.

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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.

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