my 70 - 200 2.8 L IS USM II fell off my 5D

Thanks for the heads-up! I tried this out on my 5D and I can get ALL my lenses off my 5D by barely pressing the release button (seems to be less than 1/3 of the way). Can you let me know what they fixed on the body? It has never happened to me under normal conditions, but I could see how it would very easily. On my 50D, I have to completely press the release button for the same lenses to be in a situation where they would fall off. Mine was also in the shop recently, and I asked Canon to go over it…

My wife and I have 2 7D's with the same problem the lens loosen off, it does not matter whether it is the 300mm, 500mm or teleconverter that is fitted to the body, it has also happened with a sigma lens. It has never happened with any other Canon cameras we have had only the 7D's. Canon DO have a problem, but will never admit it, especially in the U.K.

GCM wrote in post #11451738
My wife and I have 2 7D's with the same problem the lens loosen off, it does not matter whether it is the 300mm, 500mm or teleconverter that is fitted to the body, it has also happened with a sigma lens. It has never happened with any other Canon cameras we have had only the 7D's. Canon DO have a problem, but will never admit it, especially in the U.K.

I'm assuming you've contacted Canon U.K. about your issues and they somehow refused to examine/service/repair​?

Because I would have to think your cameras are still under warranty and if they are, it's best to take care of the problem now, than to have a lens separation catastrophe.

BUT if you haven't attempted to send the cameras in to Canon for service/repair... then that would be quite a bold statement to say that Canon "will never admit it" when you didn't even address it to them.

Now that I have read this thread, I'm keeping a tight grip on my new baby!

I'll keep an eye on my 7D but I check that it's locked each time I put on a lens and I can't understand how they could come loose as my release button is pretty stiff .

nitehawk55 wrote in post #11453880
I'll keep an eye on my 7D but I check that it's locked each time I put on a lens and I can't understand how they could come loose as my release button is pretty stiff .

Apparently according to less than a handful of posters in this thread, it's possible there's some variation that are considered within the tolerances of factory specs.

I personally can't see that happening on mine because the release button needs to be fully pressed before the lock disengages.

there is no way that a lens will fall of the camera without be a users fault...ive tested the lenses so many times by pulling them ,pushing them ect ect...it was a users fault or its just a misleading rumor to blame canon for something that doesnt really exist..!!!

Even though I basically think it's most likely user error or an accident I don't agree with your "there's no way" opinion ...
... everything mechanical can fail or have iffy functionality
https://photography-on-the.net …p?p=11316225&po​stcount=25

Come on my friend...you know its so damn hard to happen...you must push the release button to unlock the lens...Dont mention the entenders...it may be easier there...but in the camera-lens connection...no way..!!!

Why would a similar locking mechanism in the camera be 100% fool-proof if it can fail in a TC?
Some of them are bound to fail or be unreliable, even if it's a very small percentage.

This is a really interesting thread.

Firstly, even if the 5D was at fault, canon would probably not be obliged to fix the lens as the camera is out of warranty. They cannot be responsible for mounting extremely expensive new equipment on an old, potentially defective body.

Second, as loads of other people have pointed out, it this was a real problem it would be all over the forum. The Sigma focussing issue turn up most days, soft 24 70s are reported more than weekly, 7D focussing problems threads are very popular and these are not massive issues (or probably not even real "issues"). Given that there are tens (hundreds?) of thousand of 5Ds out there i'm sure we would have heard about this a lot more.

Third, when you are a left hander, as I am, it is pretty much impossible to hold the camera any different to a right hander as the button positions are fixed. When you hold a pen it doesn't matter where you place our fingers as long as you are comfortable. The strange contortions are to stop the ink smudging. When there are fixed contact points the method of operation is pretty much fixed.

Finally, whilst I do feel sorry for the OP, she let herself down a bit with the sexist rubbish. I hadn't paid any attention to her gender as I am sure most people hadn't. No one had said she was stupid or incompetent just that the problem may have been user error. We all make errors no matter how experienced or skilful we are. I make errors every day and just accept they were errors no matter how expensive. At the end of the day it was not an incredibly expensive repair and a good lesson learnt for all of us

big_g wrote in post #11464634
This is a really interesting thread.

Firstly, even if the 5D was at fault, canon would probably not be obliged to fix the lens as the camera is out of warranty. They cannot be responsible for mounting extremely expensive new equipment on an old, potentially defective body.

Second, as loads of other people have pointed out, it this was a real problem it would be all over the forum. The Sigma focussing issue turn up most days, soft 24 70s are reported more than weekly, 7D focussing problems threads are very popular and these are not massive issues (or probably not even real "issues"). Given that there are tens (hundreds?) of thousand of 5Ds out there i'm sure we would have heard about this a lot more.

Third, when you are a left hander, as I am, it is pretty much impossible to hold the camera any different to a right hander as the button positions are fixed. When you hold a pen it doesn't matter where you place our fingers as long as you are comfortable. The strange contortions are to stop the ink smudging. When there are fixed contact points the method of operation is pretty much fixed.

Finally, whilst I do feel sorry for the OP, she let herself down a bit with the sexist rubbish. I hadn't paid any attention to her gender as I am sure most people hadn't. No one had said she was stupid or incompetent just that the problem may have been user error. We all make errors no matter how experienced or skilful we are. I make errors every day and just accept they were errors no matter how expensive. At the end of the day it was not an incredibly expensive repair and a good lesson learnt for all of us

Well said. +1e12

Thanks

big_g wrote in post #11464634
This is a really interesting thread.

Firstly, even if the 5D was at fault, canon would probably not be obliged to fix the lens as the camera is out of warranty. They cannot be responsible for mounting extremely expensive new equipment on an old, potentially defective body.

Second, as loads of other people have pointed out, it this was a real problem it would be all over the forum. The Sigma focussing issue turn up most days, soft 24 70s are reported more than weekly, 7D focussing problems threads are very popular and these are not massive issues (or probably not even real "issues"). Given that there are tens (hundreds?) of thousand of 5Ds out there i'm sure we would have heard about this a lot more.

Third, when you are a left hander, as I am, it is pretty much impossible to hold the camera any different to a right hander as the button positions are fixed. When you hold a pen it doesn't matter where you place our fingers as long as you are comfortable. The strange contortions are to stop the ink smudging. When there are fixed contact points the method of operation is pretty much fixed.

Finally, whilst I do feel sorry for the OP, she let herself down a bit with the sexist rubbish. I hadn't paid any attention to her gender as I am sure most people hadn't. No one had said she was stupid or incompetent just that the problem may have been user error. We all make errors no matter how experienced or skilful we are. I make errors every day and just accept they were errors no matter how expensive. At the end of the day it was not an incredibly expensive repair and a good lesson learnt for all of us

That was my point too..well said my friend..!!!

guitarfish wrote in post #11327935
"THERE'S NO WRONG WAY TO HOLD IT."

Similar problem..............