EOS R5 Mark II - exposure compensation exif data not consistently recording in manual mode.

[LBVandal]

I am coming out of R5 and into R5 Mii and I have noticed that both of these camera do not consistently record the exposure compensation adjustment when in Manual Mode.  I only shoot in manual mode and sometimes I see the (for example) +.3 that I have selected under exposure compensation and sometimes I don’t see it.  I have looked at the exif data in both Lightroom and in Preview and it often just shows 0 when I had it set to some amount. 

When scrolling thru Lightroom I can see Manual Mode +3 for example and Manual Mode 0 when both settings are the same.  

How can I get my R5’s to consistently record the amount of compensation that I am forcing on the camera?  

[Peter]

Is it same if you run Exiftool?

[Waddizzle]

What does the Canon DPP4 at say?  Post a RAW file to a public file sharing platform like Dropbox, One Drive, or Google Drive if don’t have it installed. 

[LBVandal]

I don't know anything about Exiftool but I have since looked more closely at my EXIF data: 

Up until November 17, 2024 all of my thousands of manual mode shots recorded the exposure compensation value correctly,  and shots after Nov 24, 2024 none of my manual shots include any exposure compensation value other than 0.  I don't recall any updates that I completed on my computer or on my camera during that week and no equipment changes during that period either. 

I am getting only a 0 for exp compensation on both my R5 and R5Mii so the problem is not unique to one body.

My R5 is running 2.1.0 and my R5mII is running 1.0.2

[LBVandal]

I don't know anything about DPP4  but I have since looked more closely at my EXIF data: 

Up until November 17, 2024 all of my thousands of manual mode shots recorded the exposure compensation value correctly,  and shots after Nov 24, 2024 none of my manual shots include any exposure compensation value other than 0.  I don't recall any updates that I completed on my computer or on my camera during that week and no equipment changes during that period either. 

I am getting only a 0 for exp compensation on both my R5 and R5Mii so the problem is not unique to one body.

My R5 is running 2.1.0 and my R5mII is running 1.0.2

[kvbarkley]

Since "Exposure Compensation" in fully manual mode. is simply a bias to the exposure meter, I would not expect it to show in the EXIF data, any more than how far the exposure meter is off from "correct".

However, if you are letting the camera control the ISO, then it might record the compensation since it would take the compensation into account to set the ISO.

[LBVandal · Accepted solution]

I think I got it.  
I am in full manual but if I assign the back wheel to ISO I will loose my bias information, but if assign the wheel to exposure compensation I will retain the bias information. Since ISO and exposure compensation both adjust the ISO (in manual mode) the way everything works in the camera is the same but in the later the bias is stored to the exif.  Sound about right? 

[kvbarkley]

You would have to experiment to verify, but I believe that is correct.

[p4pictures]

This makes sense.

If you assign the back wheel to ISO, then you are controlling; shutter speed, aperture and ISO. Exposure compensation is irrelevant since you control all three exposure parameters.

If you assign exposure compensation to the back wheel, and are using auto ISO, then you are controlling shutter speed and aperture, but the camera is controlling ISO and therefore the compensation amount is relevant. 

[LBVandal]

What I am noticing is that when back wheel is assigned to exposure compensation OR ISO the result is the same in camera (ISO is changed to achieve the requested result in both scenarios). The only difference I notice is that the bias is recorded within the metadata when back wheel is set to exposure compensation.  I would hardly call it AUTO ISO when rotating the dial forces the change in ISO.  

I guess the Canon folk had to pick either shutter, aperture or ISO to achieve the bias and in the situation I am experimenting with ISO is being changed, perhaps there is a scenario that the camera decides to use aperture or exposure to achieve the bias but I have not noticed it in my experimentation so far.  For the time being I have simply assigned the back button to exposure compensation to achieve the desired results.