Changing Lenses with power on dangerous to Memory Card?

I wonder if there is anything official on any of this by Canon. What if we're all doing it wrong!?

Like most of the others here, I do agree that changing a lens while the camera is on will not result in damage to the lens or camera, nor does it increase the risk of dust attraction to the sensor. However, there is a caution about changing IS lenses without waiting for the IS to disengage. There were a few threads about this in the forum not too long ago.

Mark Kemp wrote in post #4160521
No,

Only if you get it squashed between the lens and the body, not if its actually in the camera!!

　Thats what I did the other day, it also reduces your frames/per/sec rate considerably on a MKIII, not to mention that the cards writting ability is severly compromised.

Hermeto wrote in post #4167009
If powered on sensor collects more dust, how come that, according to Canon’s own instructions, sensor cleaning can be performed only with camera powered on?!

It'd be hard to get past the mirror assembly and shutter if the camera was not powered on.

transcend wrote in post #4167629
It'd be hard to get past the mirror assembly and shutter if the camera was not powered on.

Why?
They could be actuated, locked in the open position and after that camera could be powered off.
With next power on, everything goes back to default position, ready for shooting – just the same as it is now.

Hermeto wrote in post #4167783
Why?
They could be actuated, locked in the open position and after that camera could be powered off.
With next power on, everything goes back to default position, ready for shooting – just the same as it is now.

Notice you need to have a full battery or AC power to clean your camera. The only way the shutter and mirror can be held open is powered up. If the battery dies and or you unplug it, the mirror comes down and the shutter closes.

transcend wrote in post #4168121
Notice you need to have a full battery or AC power to clean your camera. The only way the shutter and mirror can be held open is powered up. If the battery dies and or you unplug it, the mirror comes down and the shutter closes.

I agree, but that’s how it operates now..
Who knows what kind of improvements will new models bring to the table?
Don’t forget, less than a year ago live view was considered very difficult, if not even impossible in Canon cameras.

My point was that powering off sensor, or even the entire camera, for the purpose of cleaning is not very difficult to achieve - if it was necessary, if it was important.
Since it is not important, Canon left it the way it is now: cleaning the powered on sensor is safe and it does not attract more dust.

Does it make sense?

Hermeto wrote in post #4168156
[...]cleaning the powered on sensor is safe and it does not attract more dust.

I may have missed an authoritative post on this, but it was my understanding that although the mirror was raised, and the shutter opened for cleaning, the sensor itself was not energised.

Of course that sensor is not energized!
There’d be plenty of interesting pictures by now, of pack pads moving across the sensor in wet cleaning, or tip of the blower approaching the sensor..

I don't wann hijack the thread, but this question is quite related...

If I remember well, it's writeen in the manual of my 100-400 that you should always turn the camera off before changing lens as you could damage the IS. Any truth? Experience?

DDA wrote in post #4168424
I don't wann hijack the thread, but this question is quite related...

If I remember well, it's writeen in the manual of my 100-400 that you should always turn the camera off before changing lens as you could damage the IS. Any truth? Experience?

As said before in this thread, if the IS is still engaged you may do some damage.

Hermeto wrote in post #4167009
If powered on sensor collects more dust, how come that, according to Canon’s own instructions, sensor cleaning can be performed only with camera powered on?!

no other way to keep the mirror locked up

ashdavid wrote in post #4168497
As said before in this thread, if the IS is still engaged you may do some damage.

How?

I didnt notice any mention of it in the lens manula - I'll have to go find it now I suppose..

Yeah, I'm kind of curious of why having the power on with IS when changing lens would do some damage.

I guess it could be damaged if it is still engaged. For that, you would have to be really quick to remove the lens after taking the finger off the shutter...