R5 Auto ISO - a bug or intended behavior?

[Cytography]

I just discovered an interesting behavior with my new R5 related to AUTO ISO. For sake of discussion, assume I’m in Av mode (haven’t tested this behavior in other modes). Using the Quick Control Dial #2 (the thumb wheel surrounding the Mode button), the default behavior is for that control to allow adjusting ISO. But, quite by accident, I discovered that if I use that dial to set ISO to something other than AUTO and then engage metering (either with half shutter press or back button focus) then I can’t set ISO back to AUTO for some number of seconds. This is true whether or not I take a picture.

The amount of time I must wait to be able to go back to AUTO ISO (using the control dial #2) seems to be tied to tied to the time set in “metering timer” on camera (red) tab 7. However, if I go into the menu at Camera (Red) tab 2 >> ISO settings I can override this time delay and immediately put the camera back to Auto ISO.

This behavior is different than my 5D Mark IV. On that Camera, regardless of how I have the metering timer set, I can always press the ISO button and turn the appropriate thumb wheel and immediately set ISO back to AUTO.

Is anyone else experiencing this seemingly unusual behavior? Is it possibly a bug, or might I have some setting somewhere set that is causing this behavior.  I'm thinking possible bug since my 5D IV doesn't behave this way.

[ForMatt]

I can get my R5 back into Auto ISO immediately after double pressing the Mode button. Not ideal, but the quickest way I've found.

[mrbuns]

This is the best solution I have found on the whole internet for this issue. Did they change this behavior win a firmware update? I haven't updated mine in a while. Anyway, this reply should be pinned as the solution to the issue. It has been plaguing me for ages. Thanks

[Waddizzle]

“ This is the best solution I have found on the whole internet for this issue. Did they change this behavior win a firmware update? I haven't updated mine in a while. Anyway, this reply should be pinned as the solution to the issue. It has been plaguing me for ages. Thanks “

As near as I can tell, there isn’t any issue.  It’s just the metering timer doing its job.

When yoi half press the shutter, the metering system wakes up, and the ISO display switches from AUTO to an actual value.  

When the metering timer expires, the ISO display switches back to AUTO. If you try to change the value, the camera thinks you’re trying to override the Auto ISO values.

[mrbuns]

Yes, as has been mentioned several times already, this is "out of the box" intended behavior but that still doesn't disqualify it from being an issue, especially when other cameras like the 5Div don't do it a people get along with that system just fine. The issue also strikes in both directions; when in manual ISO mode and the shutter has been pressed (half or full) you also have to wait for the metering timer to end before you can scroll all the way back, past L, to put the camera in auto ISO again. This is a huge pain when you switch the camera on, fire off a few shots, and then you want to either switch to manual ISO or auto ISO without having to go into the menu or quick menu to do it, or wait for the metering timer to time out. The double press of the mode button is ideal 

[Waddizzle]

“ Yes, as has been mentioned several times already, this is "out of the box" intended behavior but that still doesn't disqualify it from being an issue,….”

The cameras have been working this way for decades.  I don’t”t think it is going to change anytime soon,

if you want to tweak the ISO on the fly when using ISO Auto in M mode, then I suggest programming the [Set] button for AEC,

[mrbuns]

I don't need it changed. As I said, ForMatt's solution is the best I have seen and probably better than anything that Canon would implement. I don't need to mess around with AEC, I have my solution right here. No more solutions, or assumptions, needed but thanks.

[Waddizzle]

I am still failing to understand the issue.  The ISO mode remains in Auto the entire time, throughout the metering cycle.  It switches between active and inactive.

If you have a solution, then please mark as the answer.  Thanks, in advance.

[mrbuns]

If you don't understand the issue, or you don't encounter it yourself, that's fine but I don't really know why you would keep replying to this thread. Photographers use cameras in thousands of different ways so not everyone is going to encounter the same problems as others, and that's fine, but please stop adding to the thread. I didn't post the solution ForMatt did. Not only can I not mark my reply as a solution but there is already one, less helpful answer, tagged as the solution to this issue

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[Waddizzle]

“ If you don't understand the issue, or you don't encounter it yourself, that's fine but I don't really know why you would keep replying to this thread. “

My mistake. I thought you were the OP.  You’re not.  I suggest that you start a new thread of your own. I promise not to reply to it.