M6 II, spot metering painfully slow

In another discussion about ETTR techniques, I found another way doing that. Setting the exposure to spot metering, metering on the brightest spot, adding roughly three stops of exposure compensation, to saturate(nearly) the sensor for ETTR, then shooting. So I tried that technique, and while it kind of works for me, I have the issue with what the camera does. If I point the camera into average or darker place, it meters that place. But if I point it into some highlight, it takes painfully long time for it to decrease the brightness. It takes between 8-20 seconds between it gradually corrects the exposure settings. It goes from like 25s to 1/60s in that long time. That is very unacceptable and unexpected. Obviously didn't use good keywords for google to solve this.
Anyone has good idea or solution please?
Many thanks.

//EDIT: It is nearly OK if there is no exposure compensation settings in place, but the more compensation is set, the slower all mettering modes are, but spot mettering the worst.

I just tried it with two M6ii bodies as well as an M200. I set the metering mode to Spot. In all cases, going from dark to highlight areas, both inside and outside, the metering changed and stabilized in less than one second. I don't see the long delay you mention.

I tried this in both manual and Av exposure modes, no difference. I was using spot metering, where the round spot appears in the middle of the EVF. What exposure mode are you using? What is the light level? I tried it indoors, and outdoors in cloudy weather, pointing the camera at the sky changed the meter reading quickly.

I see the behavior you mention in the other metering modes, which is expected. When shooting video the slow change is helpful to keep the exposure relatively stable as you pan to areas of different exposure, to keep the camera from making big exposure swings.

Just tried to reset my camera settings with very little change.

I tried all modes. The room is dark-ish, well it sets the camera to about 20s at ISO100 and f/5.6
The bright place pushes it to 1/40s for good exposure.

The more generic settings I use, the better the camera behavior is, although not really swift as I remember from other M bodies. But with UniWB and 2 2/3 stops of exposure compensation, it is a tragedy.

Yes it looks like some movie supersmooth mode, but I can't get rid of it.

In basic mode, it is rather acceptable or fair, there are like three noticable pulls in that transition still, but otherwise rather Okay, as it happens within one second or so.

Here is the video of it with histogram overlay (yes I tried to turn that one off too):
youtu.be/27WEJgJIhUY

what is your "exposure simulation" option set to in menu ?

"Enabled". Other choices do not offer live histogram.

if you are spot-metering then you do not need live histogram - so switch it off - it might help ( I do not own M6 II )

Will try. But blind shooting, that's rough.

I have tried FW update, camera reset, settings reset, battery out discharge, yet nothing changed. But I learned many things on the way. For example that the camera sets the same exposure settings for UniWB and for AutoWB. It's just the histogram that changes. So UniWB gives me a chance to see stuff live, but doesn't actually improve anything, while using spot metering. But spot metering does not do it all. Sometimes it is useless, especially for very small highlights areas.

I wouldn't try to keep those, they a specular most of the cases.

it is not blind

I think "exposure simulation" = "enabled" for your camera model might be what slows the "speed" of camera operation in your case

Of course. And in these days it can even be healed in postprocess. But one can miss a thing here and there, and that's usable HW could come in and solve that for the user. It's not like it's difficult.

Turned that off, and while it does get better, it still goes in somewhat slightly stepped, less smooth way, and of course without histogram. I do not remember this happening on lesser M bodies, and some DSLRs I had. Maybe I had different circumstances, but for sure I did ETTR with histogram before. That's why it looks like a problem to me. Canon always had very good and fast LiveView, so this is unexpected.

I just tried again after your edited comment that it depends on having exposure compensation set to +3, I can definitely reproduce it with histogram turned off and on. I have Spot metering turned on, and also AF mode set to Spot --- I am putting the spot AF right in the middle of the photo to test --- it seems to be metering on the Spot AF box. I too see it take about 20 seconds to adjust when you move the spot from a dark area to a bright highlight like the sky.

The workaround appears to be to press the shutter button halfway. I have my shutter button set to 'Metering and AF Start' so it will re-meter and change the exposure almost right away, each time I press halfway. This is a habit I have anyway --- I am often pressing the shutter halfway to check/reset focus, while waiting to shoot images or video.

For some reason today I don't need three stops overexposure, but less. Yet it doesn't change much. What makes a great change is focusing mode. Indeed anything else than "face + tracking" and triggering AF manually works great! That was very helpful. Many thanks.

I wonder if my previous M cameras had face tracking. If so, what was that settings, because I don't recall this issue back then. And we probably are not going to get R device such as M6 II with lenses anytime soon.
Still, thank you for your help. 👍