EOS R6 Mark II: Question about why my shutter speed and ISO are acting the way they are

[stcapp1426]

I have an R6 Mark II that I got about 6 months ago, and I am an amateur-level photographer. I shoot in manual most of the time with auto ISO and exposure compensation if I need it. I have the ISO capped at 12800. Today, I volunteered to shoot people at an event, so I set the camera to aperture priority so I could set my f stop and leave it since I was shooting them in front of a prop. I used my Canon EF mount (with adapter) 24-105 lens. My ISO was also on auto. My friend, who also has a Canon mirrorless (don't know which one) was there as well, with a Canon 70-300 EF mount lens. She set hers up the same way as I did. I noticed that my camera chose a very fast shutter speed combined with a high ISO. Shooting the same scene, her camera chose shutter speeds of around 1/200 with a much lower ISO. Why is that? Is there some setting I don't yet know about that's doing that? This has happened once before but I didn't think much of it then because I didn't have another photographer with me where we could compare settings. It seems like the shutter speed and ISO are competing with one another. What's going on? I'd greatly appreciate your help!

Sherri

[stevet1]

Sherri,

In your settings for the ISO range, or maximum ISO, is there also a setting for minimum shutter speed?

Steve Thomas

[stcapp1426]

We both had exposure compensation set to the same value -2/3 of a stop, and you would think the camera would slow down the shutter speed to compensate. 

[stcapp1426]

Yes it does. I just found it. It was set to manual 1" which when I look at it it says 1/1000, then below that is 1/30. I don't know what any of this means. There's also an auto setting. Should it be set to that?

[Waddizzle · Accepted solution]

I suggest that you become more cognizant of how you handle the camera before, during, and between shots.  When electronics fail, the failures tend to be permanent, not intermittent.

I only mentioned BBF because it caused me to become more cognizant of what my thumb was doing.  Coincidently, the issues I was having with the occasional outlier bad exposure seemed to go away.

Again, strive to be more cognizant of how you hold the camera before, during, and most especially between shots.  Not to point fingers, I think your issue is mist likely operator error related.  Electronic failures are reproducible and permanent, almost never intermittent.

[stevet1 · Accepted solution]

Sherri.

Yes, I think so. Set it to Auto.

I think that's why your camera is using a minimum of 1/1000ss and kicking your ISO up so high.

Steve Thomas

[shadowsports]

Greetings,

If not already done, it might be helpful to review the R62's user guide. 

Canon : Product Manual : EOS R6 Mark II (start.canon)

Additionally, until a better understanding of the camera function's are understood, I would refrain from making changes to it's menus while you are learning about the camera's features.

Consider resetting the camera's main and custom functions.   Establish a baseline for exposure and start from there.  Avoid extremes. 

It would also be helpful if you could post some RAW photos with EXIF data.  We can evaluate these for you.  You can use a sharing service to facilitate this.  OneDrive, DropBox, GoogleDrive, etc.   

[stcapp1426]

Thank you. It very well could be operator error. I'm new to the camera, so I'm still learning it slowly. I've never done this type of shoot before and as I said, I almost always shoot in manual so I have control. I will certainly take your advice. Again, thank you.

[stcapp1426]

OK. I don't have any custom functions set up yet. And I don't have much in the way of settings outside of the defaults, except BBF and things like AI Focus, single point focus. 

[stcapp1426]

Intuitively I thought that meant the highest would be 1/1000 and the lowest would be 1/30. I don't know how it got set to that, since I never set it, but I will change it to auto and see what happens.  Thank you.