Originally posted by seachunk2 There was also a bunch that appeared under exposed but that was because I didn't compensate the exposure. These in particular were of a pair of mallards I found puddling in the stream that feeds into the lake. Yesterday was a cloudy day and I took these shots around 3:00 PM. The water was dark. I should have went -1 (kind of the opposite effect that WMPB pointed out with the sky background).
NO, perhaps not. This gets a little complicated, but let me try to sort it out in a general way.
First, the reason I suggested adding exposure compensation if you're shooting a bird in a branch with the sky as a background, is that,
unless you were using spot metering on the bird, then the camera's meter is going to be heavily influenced by the bright sky, and you'll end up with a shot that's got the sky correctly exposed but the bird too dark. In that case, the problem is the high dynamic range of the scene. And you have to risk (or accept) blowing out some of the sky in order to get the bird correctly exposed.
But you do NOT have to compensate in the opposite way if the dark bird is setting (floating) on a dark background. The dynamic range of your duck shots is not so great. Put your meter on matrix or spot metering. It should then be able to read a scene like this pretty well.
And now it gets complicated.
You've obviously learned that the camera's light meter reads the scene on the assumption that it's overall a middle gray. One very important consequence of this is that you need to ADD exposure compensation for bright scenes. The classic example is photographing a landscape full of bright, white snow. If you want to keep the snow bright and white, you have to add 1-2 stops of exposure compensation. If you're taking a closeup portrait of a bride's white dress (where the white dress fills most of the frame), you'd want to add a stop or so of exposure compensation. Some people describe this as deliberately "overexposing" the scene. I don't like to talk about it that way, because you're not overexposing at all, you're trying to get a correct exposure. I simply call it "biasing the meter".
Now, what if you are photographing a pile of coal in a coal cellar? In theory, you would want to bias the meter
negatively in this case, lest the coal end up looking lighter in your photo than it appears in reality. BUT THE THEORY DOESN'T WORK SO WELL WITH DARK SCENES when you are shooting digital. Why not? Because of the way that digital sensors work. You have to read
the classic "Expose to the right" article at Luminous Landscape for the details. The basic idea is that the camera's digital sensor distinguishes more shades at the right end of the histogram. What this means is that, shooting digital,
you always want to think about biasing the meter to the right, so long as you don't blow important highlights. If I'm shooting a coal cellar, I'd want my histogram's hill to appear in the middle—not off to the left.
Yes, that would mean that the picture would initially appear to be overexposed, especially when I view it on the computer. That's okay. Because of the nature of digital capture, if you somewhat "overexpose" the pile of coal to start with and then correct on the computer by pulling the histogram back to the left, you'll end up with a better photo—with more detail in the darks—than if you exposed the shot in a nominally correct way to start with.
Anyway, if I'm shooting ducks at the lake on an overcast day, I will often ADD a little exposure compensation, in order to move the histogram to the right. Then I might pull the histogram back a bit to the left on the computer. IN Lightroom, I'd do this by boosting the black slider, and/or by pulling the exposure slighter to the left, and/or by pulling brightness slider to the left—or possibly with tone curves. Depends on the photo.
There is one last thing to be considered here. Our eyes can see greater dynamic range than the camera can, and our brains to some extent compensate for our eyes in a way that our brains don't compensate for photos. What this means is, you may want a dark scene (ducks on a lake on an overcast day) to appear in the photo a little brighter than perhaps they really were.
Quote: I also might of had the WB set for sunny instead of cloudy (didn't dawn on me until I got home). So now I've started paying attention to the WB setting before I start shooting and the histogram afterwards (very useful feature).
I'd recommend shooting raw with white balance set to auto, and forgetting about white balance after that.