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Dark Images on AV Setting

Phil_Scott Avatar
25 Jul 2020 12:41PM
I have a Conon 7D MK2 and use it with a Canon 100 - 400 mk1 lens, I take a lot of bird pictures using the "AV" setting and everything was fine until a couple of days ago. I took a couple of pictures of a stoat through the car windscreen and on the camera's display panel, the images seemed very dark. I thought that this was due to bright sunlight on the screen. This is not the case as when I view my images on a computer they are very dark. i tried changing the setting from "AV" to "Auto" and the pictures are the correct colour and can be viewed on the camera screen. Any assistance with how to resolve this issue will be appreciated.
Cephus Avatar
Cephus 18 2.7k England
25 Jul 2020 12:54PM
Check your exposure compensation.
Stevetheroofer Avatar
25 Jul 2020 12:55PM
HI Phil
What metering mode mode were you using? spot metering and you could have settled the camera on a white part of the stoat or have you moved the exposure compensation wheel, which both seem possible, the sort of things I do! Blush

Dave_Canon Avatar
Dave_Canon 17 2.2k United Kingdom
25 Jul 2020 1:38PM
I use AV for landscapes etc. but for bird shots would use TV (shutter priority) anyway. Given than birds, insects and animals move you do need to ensure that you can freeze any movement. On the other hand, you can use a higher ISO and many use auto ISO. It is worth checking exposure compensation as suggested. I do not normally use EC myself because, if the situation is tricky, I would tend to use manual exposure. Occasionally, I discover that I have some EC set accidentally so worth checking.

mattw Avatar
mattw 19 5.2k 10 United Kingdom
25 Jul 2020 1:52PM
I still use AV for wildlife - if you want to freeze the movement, use AV and select the widest aperture you have. If the shutter speed is still to slow, then change the ISO

In answer to this question - I would check to see if you have Exposure Compensation dialed in by mistake.
sherlob Avatar
sherlob Plus
17 3.3k 133 United Kingdom
25 Jul 2020 2:06PM
I agree with the comments about exposure compensation above. I would add that if you turned on the histogram function on the LCD it would enable to you to better judge the exposure. E.g. I often take low light images (twilight and nightscape) and the brightness of the LCD can easily fool one to thinking the exposure is ok when it is actually underexposed. Checking the histogram enables me to judge the exposure and how much I need to adjust my settings.

Bottom line: don't just rely on your image preview for exposure judgements.


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