40D had problems..................

Diego Garcia

Diego Garcia

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Hi all,

Well, after testing the 40D in the field, mine has gone back

Terrible issues at 2.8 or faster. Effectively not locking focus, missing focus, not getting stuff in one shot more than AI Servo. I think it may have picked up the early Mark III issues at 2.8 or faster? Any one else experiencing this?

As a whole, I thought it was a great camera, aside from the focus issues I mention, the high ISO performance is something else.

So, I am now looking at the Mark III as I want that lovely high ISO I saw with the 40D but am seriously worried about getting one in. Any ideas on seriels that may be worth looking at?

here is an example of the issues I mentioned. I stalked the squirrel, shot right on his eye with my focus point, yet look at the foreground - thats the part in focus.

Any ideas?

sq1.jpg


Thanks,

Pete.
 
Damn! Let's hope it's just a bad example.
 
Not having that problem with mine that i've notice.

Was out shoot squidgers at weekend with a Sigma 70-200 (f2.8) and Sigma 1.4x TC.

will re-examine the pics when i get home later and report back.
 
Did it just happen with one lens or a few of them. Front focus/Back focus has been a problem with minolta 5Ds, 7Ds and the Alpha 100.
 
Cant say that I've noticed the problem, but then I've only had it 2 days.
From a selection of about 10 shots yesterday all were a I expected.
 
Only really had a couple trips out with my 40D so far. I did notice on One Shot the AF worked in a different manner to my 30D with the outer focus points being better at picking up items even when not using the cross points. Not had had any issues with focusing not locking on, in fact the reverse, it's been very good at holding a lock.......

IMG_0182.jpg
 
mines going back tomorrow as there is muck on the focusing screen when it was straight out the box, and the usual air blowing doesn't shift it :(
 
rwotton said:
mines going back tomorrow as there is muck on the focusing screen when it was straight out the box, and the usual air blowing doesn't shift it :(
Click to expand...


Tried removing it to clean it? Unclips very easily.

I had a stubbon piece of dust on mine - 30 secs later and its clean and back in. :clap:
 
silly question, how do you remove it? what do i clean it with once its removed?
 
rwotton said:
silly question, how do you remove it? what do i clean it with once its removed?
Click to expand...

garnet1.jpg


:eek:

or ask Janice

:runaway:

now seriously.....

Something VERY soft. I've scratched one before now, it's made up of gazillions of very fine grooves that you dont want to break.

A soft brush should do the trick

You'll probably find that its on the other side of the screen.
 
there is a small clip that holds it in place, unclips with a fingernail.

Will take pics of mine when i get home if you've not sussed it out by then :)
 
Gord,

Thats a quality shot and what I would expect. However, the body I had exhibited nothing like that and I really dont know why....All of my previous Canon kit has been spot on.

However, I dont know whether to try another 40D or go for a Mark III, which could open another can of worms.

At the moment, I am sans camera and dont quite know what to do. I cant keep trying to change cameras if they are faulty nor can I afford to send stuff to Canon each and every week!!!!

What to do eh?

Pete.
 
rwotton said:
do i just push it in, and does the screen drop down?
Click to expand...

Yes.

Turn the cam upside down without a lens on it and just inside the mounting ring, above the flash, you'll find a clip. Flick it with your finger nail or soft plastic object. The frame holding the screen will pop up.
(if you had the cam the right way up the lot would just fall out).
There's a spring and the focusing screen under it.

Take out the screen with a pair of tweezers or similar. You dont want oil from your fingers on it.
 
Diego Garcia said:
Gord,

Thats a quality shot and what I would expect. However, the body I had exhibited nothing like that and I really dont know why....All of my previous Canon kit has been spot on.

However, I dont know whether to try another 40D or go for a Mark III, which could open another can of worms.

At the moment, I am sans camera and dont quite know what to do. I cant keep trying to change cameras if they are faulty nor can I afford to send stuff to Canon each and every week!!!!

What to do eh?

Pete.
Click to expand...

Pete

There are more people experiencing problems with the mk3 than the 40D, if you like the 40D I would try another.

I tried a mk3 and it was a disaster, not had my hands on a 40D ........ Yet.

Mark
 
Pete, any way to try a different lens? I wonder if it's not the lens that needs calibrating rather than a prob with the camera...
 
Hum - not had a problem focussing with mine.
85630585.jpg


Just checked the full res image and it's spot on.
 
UPDATE.

Well, I am have decided to go for another 40D as I really like the machine and with my scaled down work load at present, I cant justify the 3K on the Mark III which could be a lemon. I will add a battery pack however, as I do miss the size of my N's. I want the cash to go towards a medium format camera to be honest.

There is so much I like about the 40D that I feel compelled to try again as there are images on the net that are a testament to its ability, a baby Mark III if you will.

Will test this one over the weekend and see how it copes, but as before, you can clearly see from the Squirrel shot that something was amis with my first body. The real test comes in the next few weeks - Bristol rugby and the Weston Beach Race.

I will of course consider the lens after this, but not had any problems prior to this aside from the occasional misfocus due to the sport I cover.

Thanks all,

Pete.
 
Hum if I had £3k it would have been £800 on the 40D and the rest the missus would have spent :D
 
Interesting, i need another body, and currently debating a mk2n mk3 or possibly this new 40d, so ill be keeping an eye on this.

Dont suppose you know the max apperture the 40d will A-focus to?
 
russdaz said:
Dont suppose you know the max apperture the 40d will A-focus to?
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Can't help with that, but in case you hadn't read about this particular feature....

"Adding to this AF performance, the 40D incorporates a diagonally mounted, high-precision cross-type sensor at the center AF point that is sensitive to both vertical and horizontal lines when fast lenses (f/2.8 or faster) are used, for for added accuracy and precision with these wide-aperture lenses"
from http://www.usa.canon.com/consumer/controller?act=ModelInfoAct&fcategoryid=139&modelid=15653
 
Diego Garcia said:
... you can clearly see from the Squirrel shot that something was amis with my first body.
Click to expand...
NO.

Something has caused front focussing. It could be a problem with the body or it could be a problem with the lens. Or it could be that they're both within manufacturing tolerances, but at opposite extreme ends of the tolerance range and simply don't work well together.

You need to test the body with more than one lens, and/or the lens with more than one body, before you can confirm the diagnosis.
 
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