topic Re: R6 auto ISO problem in EOS DSLR & Mirrorless Cameras

R6 auto ISO problem

Sborg — Thu, 27 Jan 2022 23:40:07 GMT

I usually have my R6 set with Auto ISO on and locked, and I shoot in TV or Aperture mode. I've noticed on several occasions that when I look through the viewfinder to frame a shot, the view is washed out because the Auto ISO is high, e.g. 25600, even though the weather is bright and sunny. The setting will be stuck at that level and I have to turn the camera off and back on. This usually happens when I haven't taken a shot for several minutes, typically when the camera has been sitting besides me on the car seat.

What would cause the Auto ISO to jump to an inordinately high level when idle?

Re: R6 auto ISO problem

Waddizzle — Fri, 28 Jan 2022 13:32:10 GMT

Unknowingly pressing the AEL button could cause it. Safety Shift?

Personally, I only use ISO Auto in M shooting mode. I never want to allow the camera to control more than one leg of the Exposure Triangle at the same time.

Re: R6 auto ISO problem

Sborg — Fri, 28 Jan 2022 18:37:48 GMT

When this happens, the Auto ISO is still locked. It hasn't become unlocked accidentally.

If the Auto ISO would correct when I try to frame the picture, there wouldn't be a problem, but when this happens, the ISO is stuck on 25600; it doesn't adjust when I point the camera at the target.

Re: R6 auto ISO problem

Sborg — Sat, 29 Jan 2022 17:18:21 GMT

Not sure what that has to do with the Auto ISO problem.

Re: R6 auto ISO problem

Waddizzle — Sat, 29 Jan 2022 21:25:51 GMT

You could try switching out of ISO Auto to a fixed setting, wait a couple of moments, and try to meter a scene, and then switch it back to ISO Auto. I would not switch to ISO Auto in Tv or Av modes. I would switch out of ISO Auto, and leave it that way for Av and Tv modes.

Personally, I prefer shooting in M mode with ISO Auto, and programming the [SET] button for Exposure Compensation.

Re: R6 auto ISO problem

Sborg — Sun, 30 Jan 2022 01:15:23 GMT

Thanks, but in the time it would take to do what you suggest, I could simply turn the camera off and back on. I'd like to what causes the problem.

I shoot wildlife, particularly birds, and I often don't have time to change settings when the opportunity to take a picture occurs. That's why I usually have the ISO locked on Auto.

Re: R6 auto ISO problem

travisphoto — Sat, 19 Feb 2022 06:08:00 GMT

I have experienced on multiple occasion the AUTO ISO (while in Manual) on an R5 inexplicably getting stuck in a very low setting ISO, e.g. 100 or 160. Even taking the batteries out doesn't seem correct it, the camera just has "to decide" to start behaving properly...extremely annoying for photojournalism type photography.

Re: R6 auto ISO problem

Dslewis — Fri, 25 Feb 2022 13:51:06 GMT

I had the same problem a few days ago with R6 suddenly going to 125000 I was trying to photograph a group of friends and quickly turned camera off and on with no change and then pulled the battery out with no change. I then used my iPhone! Later I limited the ISO range but I’m not certain I had it on auto to begin with. Now I have it off ISO auto. Later in the day the camera jumped to a very low shutter setting (ISO at 320), washing out a picture. What’s going on? I’ve been shooting with many cameras over fifty years with all vintages of Canon and Nikon SLRs, DSLRs and mirrorless and never had this happen. I haven’t found that inadvertently pressing the rear buttons has any effect. Perhaps Canon needs to look into this. I was afraid my camera was faulty and was glad to find this conversation.

Re: R6 auto ISO problem

awilliams — Sun, 02 Oct 2022 20:20:00 GMT

am having this same issue! T he ISO just jumps up to 12800 for no reason. It's very hard to be consistent and not be freaking out when you camera is doing things that you can fix in the moment! What is up with this?!

I will be on ISO (I control it) and then all of a sudden AUTO ISO will turn itself on, for no rhyme or reason.

Anyone have any idea? I recently shut off the Sspeed from metering/ISO when the camera is not in use, and that seems to possibly be it. It seems Auto ISO goes on after you bring the camera back online?

Re: R6 auto ISO problem

Waddizzle — Sun, 02 Oct 2022 20:39:40 GMT

What metering mode are you using when this occurs?

Evaluative metering is the least understood metering mode. It works better than many people realize. Most of the reasons given to use other modes, like Spot Metering, are actually better reasons to use Evaluative Metering.

Re: R6 auto ISO problem

Tronhard — Sun, 02 Oct 2022 22:21:59 GMT

First thing is to check your firmware. For the R5 or R6, at time of writing, it should be 1.6.0. If not update it.

What lenses are you using?

What metering mode?

Have you made any customization settings? If in doubt, save your current config to one of the C# values and do a camera reset.

Re: R6 auto ISO problem

jmontygo — Sat, 29 Oct 2022 19:02:24 GMT

I had this same issue and resetting my R6 fixed it for me. Obviously had to spend a few minutes reconfiguring my camera but life is good again.

Re: R6 auto ISO problem

Val23 — Wed, 19 Jul 2023 03:47:17 GMT

Just sent my 2 month old R6 Markll in for the same issue. Shooting in complete manual mode, no auto iso. Camera settings went crazy. Called Canon tech with no solution.

Re: R6 auto ISO problem

Waddizzle — Wed, 19 Jul 2023 09:38:19 GMT

@jmontygo wrote:
I had this same issue and resetting my R6 fixed it for me. Obviously had to spend a few minutes reconfiguring my camera but life is good again.

I gave up trying to offer suggestions once the OP declared cycling power is quicker and easier, even though doing so would “fix” his problems.

Re: R6 auto ISO problem

Dan28 — Wed, 04 Oct 2023 17:07:59 GMT

I have the same problem with my R6 MarkII. Random loss of auto ISO when shooting in P mode. Impossible to restore because not in ISO settings! I have to turn it off and it doesn't always work on the 1st try...
When will Canon fix this bug?

Re: R6 auto ISO problem

Waddizzle — Wed, 04 Oct 2023 21:46:14 GMT

@Dan28 wrote:
I have the same problem with my R6 MarkII. Random loss of auto ISO when shooting in P mode. Impossible to restore because not in ISO settings! I have to turn it off and it doesn't always work on the 1st try...
When will Canon fix this bug?

You should start new thread for your issue. The more threads there are about a specific, then the more likely someone at Canon may take notice of it.

Re: R6 auto ISO problem

JAYSTATON — Wed, 01 Nov 2023 22:41:14 GMT

Both my R6 and R occasionally switch to Auto ISO. I NEVER use Auto ISO. I shoot alot of family/wedding beach sunset photos with off-camera flash. Normally shoot it with ISO about 100-200. Then the camera changes my ISO to Auto for no reason. I have to manually change my ISO range to 200 max to stop it. And once it does it, it does it alot during the shoot.

Re: R6 auto ISO problem

Waddizzle — Thu, 02 Nov 2023 21:46:02 GMT

You should start a new thread for your issue. The more threads there are about the same issue the more likely Canon Support may notice. This forum is not Canon Support or Help.

I suggest that you review the button and control functionality on the camera body and the lens. There are multiple ways to change ISO that you may not be aware of. I find Fv mode to be easy to dangerous because it is too easy to accidentally change settings.

For example, I believe the default behavior for the lens control ring is ISO control. I keep this disabled because it is very easy to bump and change the setting.

Another recommendation is to use custom shooting modes with auto-update disabled. I do well over 90% of my shooting using a custom mode when I must get the settings right. Once the metering timer expires, everything goes back to the user defined defaults. Any changes whether intentional or accidental are created out.

Re: R6 auto ISO problem

JAYSTATON — Fri, 03 Nov 2023 01:06:48 GMT

Hi Waddizzle.

I started a new thread as you suggested. Thank you!

I am familiar with FV and would never use it. And my lenses are all EF; without the ring.

When I set the ISO to 100, and half press the shutter button, the camera shouldn't change the manually set ISO to AUTO ISO.

Re: R6 auto ISO problem

bvf — Sun, 10 Dec 2023 09:36:10 GMT

I ended up finding this thread as I was having problems with Auto ISO on an R6 Mk II (with latest firmware installed). My problems, at least some of which relate to this thread, were:

1) In fully auto (green A+) mode, auto ISO would appear to work, but then ISO gets stuck at 25,600.

2) In modes like Av, if I pick Auto ISO the camera only selects low ISO values, typically 100-200, meaning over-long exposure times.

3) In modes like Av, if I choose Auto ISO then I get into some state where Auto is displayed in light grey on the screen alongside any ISO value I then select manually, and my selected ISO value gets changed by the camera. And I cannot get back to Auto on the ISO selection dial - it just isn't there.

I've found two things that resolve my problems:

a) Over on dpreview, a correspondent pointed out that pressing M-Fn twice resets the ISO selection function to its original state before you selected Auto. This works for me, but I guess may not work if you have customised that button.

b) In the menu settings, Camera Menu 2 > ISO speed settings > Min. shutter spd. , I had set a manual value of 1 second. When I re-set this to the Auto (standard) setting it resolved the problem of the camera selecting only low ISO values in Av.