Help! EOS40D problem

scubataff

scubataff

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Martyn
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I have been out on a shoot today and half hour into it my camera lost all ability to autofocus, on every setting. I reverted to manual and about an hour later it worked again... for about 10 mins. I've lost a great days shooting here, anybody know why????:shrug:
 
scubataff said:
I have been out on a shoot today and half hour into it my camera lost all ability to autofocus, on every setting. I reverted to manual and about an hour later it worked again... for about 10 mins. I've lost a great days shooting here, anybody know why????:shrug:
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Funny you should say that, I was out today photographing red kites with my 40d and 400mm 5.6 and it would`nt lock on, I.ve just been deleting 90% of them, I don`t think it`s a camera problem(I may be wrong) because i`ve been useing other lenses without a problem I also photographed a footpath sign with the 40d + 400 and it worked well but the kites I could`nt lock on in autofocus.
 
poacher said:
Funny you should say that, I was out today photographing red kites with my 40d and 400mm 5.6 and it would`nt lock on, I.ve just been deleting 90% of them, I don`t think it`s a camera problem(I may be wrong) because i`ve been useing other lenses without a problem I also photographed a footpath sign with the 40d + 400 and it worked well but the kites I could`nt lock on in autofocus.
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Couldnt even focus never mind lock on.. first shoot with a model, over 500 pics and prob 3/4 to be binned me thinks... but still have a camera i can;t use.. prob summit i've done but i don't no what.... should have stuck to my Fuji
 
UPDATE
can now autofocus on all settings except M, AV, TV.... ??????????
 
Check the AF/Drive custom functions under Custom Function Group111 to make sure you haven't assigned AF to the Exposure Lock Button (*) by your thumb on the rear of the camera.

Failing that, try resetting the camera to all default settings.
 
CT said:
Check the AF/Drive custom functions under Custom Function Group111 to make sure you haven't assigned AF to the Exposure Lock Button (*) by your thumb on the rear of the camera.

Failing that, try resetting the camera to all default settings.
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reset never worked. what should be highlighted there.. AF stop, AF start, AE lock, AF point , one shot or IS?
 
Mine's on AE Lock. I've never altered it.
 
I've often wondered which is the best one to leave it on, CT any particular reason why you leave it on AE Lock ? If don't ask I'll never learn.
What do other 40D users leave their AF/Drive custom functions set at and why?
 
I'm not going to go through all the options Frank, because I'd just be re-writing the manual pages 157 -160. :D

These options deal with various functions you can assign to the AE Lock button (*) on the rear of the camera by your thumb. By default it locks the exposure at the point you've metered on, even if you then pan around with the camera. So if you spot metered on the face of your good lady or significant other against a bright or dark background, then pressed the AE Lock button with your thumb, you can recompose the shot with your subject elsewhere in the frame rather than the centre, and the metering will still be correct for her face. That's the default setting and the one I leave it on as I find it very useful.

A lot of people like to assign AF to this (*) button instead. In this mode you press the button to auto focus and the AF function is now removed from the shutter button, which now just fires the shutter.

I think those are the commonly used options Frank but there are other custom settings you can assign to the (*) button, but I think these two are the most important ones. Do have a read of the other possibilities though.. :D
 
Thank's CT, I like your chosen method sounds a sensible choice. will set mine now before I forget and see how it goes.
 
It's pretty much personal choice really Frank . Have a play and set all the options... you never know- and at least you know where to set it back to.
 
CT said:
It's pretty much personal choice really Frank . Have a play and set all the options... you never know- and at least you know where to set it back to.
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Just hope you don't lose all use of autofocus... seems my crashes everytime i do sopmething with that setting and can only manual focus if i change it. also if i change from AF-MF on the lens then try to revert to AF again i lose the option to autofocus, same thing happened when i turned the IS off, i lost all autofocus capability...

doesn't seem right...
 
It doesn't seem right does it? I'd just clean the contacts at the camera end, as it's happening with all lenses it seems to point to a camera problem, You can use an eraser (rubber) to clean the contacts,

If that fails, I'd think about sending it back without delay.
 
CT said:
These options deal with various functions you can assign to the AE Lock button (*) on the rear of the camera by your thumb. By default it locks the exposure at the point you've metered on, even if you then pan around with the camera. So if you spot metered on the face of your good lady or significant other against a bright or dark background, then pressed the AE Lock button with your thumb, you can recompose the shot with your subject elsewhere in the frame rather than the centre, and the metering will still be correct for her face. That's the default setting and the one I leave it on as I find it very useful.

A lot of people like to assign AF to this (*) button instead. In this mode you press the button to auto focus and the AF function is now removed from the shutter button, which now just fires the shutter.

I think those are the commonly used options Frank but there are other custom settings you can assign to the (*) button, but I think these two are the most important ones. Do have a read of the other possibilities though.. :D
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isnt the menu option you are referring to CT (custom III) to do with the AF STOP button on your LENS? and not the AF ON button on your camera???
The menu which deals with teh functions of the AF ON button on the rear of thecamera is custom IV-1. I dont seem to be able to exposure lock by using the star now :( and i have checked that i didnt give those 2 buttons opposite status. i just want normal shutter controlling af... and the star button making exposure lock.
 
ive just reset the whole camera... camera settings and custom functions too... and when i press the * button still nothing shows in the viewfinder that the exposure is locked :(
 
I'm a fool!!

I use manual all the time and the exposure lock doesnt work in manual as there is no reason for it too.

Works fine on AV & TV!! Panic over!! :$
 
i'm having the problem in all settings on and off but always in AV, TV, P, M i.e all custom setting... yesterday it wouldn;'t even work on the auto functions but that now seems to have corrected itself.... but for how long? but still no go in custom settings, even after pressing every reset button i can find
 
is there a seperate function thast not only clears the custom settings but actually resets the camera to how it was *** it left the factory??
 
Janice said:
I'm a fool!!

I use manual all the time and the exposure lock doesnt work in manual as there is no reason for it too.

Works fine on AV & TV!! Panic over!! :$
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LOL. Never mind - you got there in the end.:D
 
scubataff said:
is there a seperate function thast not only clears the custom settings but actually resets the camera to how it was *** it left the factory??
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Yep - 'Clear All Camera settings' Page 44 in the manual.
 
Sounds like you need to get it returned. :shrug:
 
frank said:
Thank's CT, I like your chosen method sounds a sensible choice. will set mine now before I forget and see how it goes.
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Just remember though Frank that on the 40D you have a dedicated AF button just to the left of the * button - marked AF ON which gives you the AF function anyway.
 
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