6D MkII Overexposure


Merlin_k Plus
10 39 13 United States
24 Apr 2019 7:03PM
I recently purchased the MkII, upgrading from an old 40D. I see to be having problems with the camera tending to overexpose. It's especially noticeable when in dim lighting, almost as though the camera is overcompensating. But for example I took this today of some snowdrops. Ignore the fact it is out of focus, badly framed etc. Just let me know what is happening with my exposure.

ISO320,in aperture mode set at f13. The camera set the time as 1/125 sec. Metering is set as centre weighted average. Auto lighting optimiser is off. RAW

I realise I am probably doing something stupid, or messed up a setting, but any suggestions happily received.
92263_1556129005.jpg


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Fma7 4 1.0k United Kingdom
24 Apr 2019 7:24PM
Is it over exposed?

It looks like there are a full range of tones from black through to white.

Need to know how you are processing the RAW file, and I'm sure the highlights could be pulled back in software
sherlob Plus
13 3.1k 129 United Kingdom
24 Apr 2019 8:11PM
I suspect you shot this on matrix metering? The image is actually relatively well exposed when considered across the whole frame. Yes, the whites of the flower heads are blown, but given the range of tones I suspect this would likely fool most cameras. Two options jump out: look at the preview image when making the exposure and in particular the histogramme. If the highlights are clipped then dial in a stop or two exposure compensation. Alternatively, switch metering modes from matrix to spot - set the exposure using your preferred method but ensure the spot meter is on the flower head, lock the exposure and then recompose before exposing. Personally, in circumstances like these I find exposure compensation the easier option.

Edit: my suggestion relates to getting the exposure right in camera. I suspect Fma7 has a point, but if the exposure is way out no software will enable you to salvage the h8ghlights.
Merlin_k Plus
10 39 13 United States
24 Apr 2019 8:37PM

Here is another one. Again in aperture priority. Going with the camera in aperture mode with an aperture of f/8 I had to push the ISO to 10000 and even then the time was 1/60. But it was overexposed. I brought the shutter time down to 1/320 and f9 to get a much better exposure.
92263_1556134417.jpg


92263_1556134608.jpg


Fma7 4 1.0k United Kingdom
24 Apr 2019 8:44PM

Quote:ensure the spot meter is on the flower head


Then it will be under exposed?
Fma7 4 1.0k United Kingdom
24 Apr 2019 8:46PM
You don't have some exposure compensation dialled in by any chance?

Link
Fma7 4 1.0k United Kingdom
24 Apr 2019 8:59PM
Might want to have a look at these:

Link

Link
Fma7 4 1.0k United Kingdom
25 Apr 2019 10:40AM

Quote:Here is another one. Again in aperture priority. Going with the camera in aperture mode with an aperture of f/8 I had to push the ISO to 10000 and even then the time was 1/60. But it was overexposed. I brought the shutter time down to 1/320 and f9 to get a much better exposure.


In aperture priority changing the aperture or ISO should make no difference to the exposure, the camera should just change the shutter speed to suit.

How did you "bring the shutter speed down to 1/320"?
EddieAC 14 2.5k 2 United Kingdom
25 Apr 2019 11:02AM
One thing to check is that you have auto bracketing turned off as this will cause exposure to jump around if mistakenly left on.

Although you would also be experiencing under exposure as well.
Merlin_k Plus
10 39 13 United States
25 Apr 2019 11:19AM
Auto bracketing is not on.
I used the exposure compensation to reduce the exposure and thus the shutter time came down to 1/320.
I have been using the exposure compensation to correct the exposure
Tianshi_angie 4 2.6k England
25 Apr 2019 12:50PM
I have recently also changed cameras and the new one is very different to the old one. I had the same problem as you - couldn't understand why when I had the shutter speed on 1/500 and the aperture on f27 and it was still over exposed. I discovered (I had forgotten that I had done it) the ISO was on 8000. I never moved the ISO on my old camera as it produced very noisy images but the new one is OK .....! Not saying you are as forgetful or as 'amateur' as me but check through the entire menu which is how I discovered my mistake.
banehawi Plus
15 2.2k 4046 Canada
25 Apr 2019 4:01PM
Is the camera brand new?

Is the ISO set to Auto?

Is the Min shutter speed set, and how is it set, auto or manual?


Also, READ THIS
Merlin_k Plus
10 39 13 United States
25 Apr 2019 5:21PM
Brand new.
No, I set the ISO. I tend to shoot in aperture priority, no minimum shutter speed.
banehawi Plus
15 2.2k 4046 Canada
25 Apr 2019 5:40PM
Read the link seems itís to do with iso increments.
Merlin_k Plus
10 39 13 United States
25 Apr 2019 6:09PM
Certainly interesting to read. Thanks.


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