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How to Get Creative with Exposure
As a beginner photographer, you’re probably taking getting
the correct exposure very seriously – and that’s good. But what if I
were to tell you that there is no such thing as right or wrong exposure? You’d
think I’d gone a bit mad, wouldn’t you?
Photographers do it all the time. Have a look around the internet
or in photography books, and you’ll see beautiful images that are technically
under or over-exposed, but that only makes them more pleasing to look at.
The key difference with these images to the too dark or too
bright snapshots you see everywhere, is that they are deliberately under
or over-exposed to give an effect. The photographer knew what he or she wanted
before they took the image, and they changed their settings accordingly. Before
we get into exposing for creativity, I’ll explain what underexposure and
overexposure mean.
What is Overexposure?
Simply put, it’s an image that’s brighter than it should be. Too
much light has been allowed in to the camera sensor, resulting in loss of
detail in the light areas, and no shadows to give contrast. If you turned your
camera’s highlight warning on when you took the image, it would be flashing
bright red on the LCD screen where all the highlights are blown out.
You can’t save blown highlights from a digital camera in post
processing. There is simply no detail left for your photo editing software to
recover. It’s different with film, just to confuse matters – you try to
overexpose film rather than underexpose, as it makes it easier when it comes to
print making. However, we’re concentrating on digital images, so just be aware
that there is no recovering of loss of detail in overexposure.
The image below is very overexposed. Large parts of the baby are
completely without detail, and the whole thing has a sort of ‘washed-out’ look
to it.
What is Underexposure?
Underexposure is the complete opposite. It’s when an image is so
dark you can’t see any detail in the shadow areas, just blackness. Too little
light has been let in to the camera sensor. If you turned your camera’s shadow
warning on, it would flash bright blue on the screen where your shadows were
completely black. It’s a loss of detail at the bottom end of the spectrum, as
opposed to loss of detail at the top end with overexposure.
Technically, you can recover underexposed shadows in post
processing with your image editing software. The detail is still there in the
image, unlike with blown highlights in overexposure. There’s a fine line to
tread, though. Bring the shadows up too far in post, and your image just looks
wrong. I think it’s fair to say that trying to fix an accidentally underexposed
image in post won’t work if it’s too far gone.
The image below is meant to have a ‘low key’ lighting effect,
but personally I would call it technically underexposed. The blacks are
completely without detail, and the baby’s skin is murky and dull-looking.
So, What is Technique of Correct Exposure?
Technically correct exposure is where the image looks right,
neither too light nor too dark, and all the highlights and shadows are visible
– theoretically, anyway. It’s a photo that looks as close as it can to what we
see when we look at the same subject in real life.
It is actually impossible to capture a totally realistic image
in terms of exposure. Even HDR techniques don’t quite manage it, but they can
come close if used properly. Our eyes are far better at seeing highlights and
shadows in a scene than a camera.
This image below has technically correct exposure. The highlight
detail is visible, and there are no overly-dark shadows. This is mostly what
we’d see with our eyes if we looked at the same scene.
Using Exposure Creatively
Now I’ve explained what correct exposure is and isn’t, you can
forget it if you want. Technically correct exposure is what your camera will
mostly give you if you have it on program or auto. If you have it on manual
mode, you get to experiment and choose the correct exposure – for you. That’s the
point; there is no correct or incorrect way to expose an image, it’s a creative
choice made by you, the photographer, not the digital brain of the camera.
Another photographer may choose to expose the same image differently, but it
doesn’t mean that you or they are wrong.
You don’t need to start deliberately over or underexposing all
your work now just for the sake of it, (unless you want to!) but a bit of
thought before you take your image is a good idea. How bright or dark do you
want parts of your image to be? Do you want a silhouette of someone with a
bright light behind them? Give it a bit of thought and go for it! Would you
like your sunlight reflections on water to sparkle like diamonds with blown
highlights? Experiment with different exposures that give you the effects you
want.
These two images below show how creatively under or overexposing
can transform an image from ordinary to spectacular.
See how the background sky of this image is overexposed and lacking detail? It makes a
brilliant backdrop for the model and is visually stunning. The model herself is
correctly exposed, only the sky has blown highlights.
On the other end of the spectrum, we have this wonderful
silhouette of the man in the window, caused by underexposing him, but having
correct exposure for the window and most of the books.
You can also combine under and overexposure in one image, like
the one below:
You will probably find that you discover whether you prefer
‘darker’ or ‘lighter’ images after experimenting. I personally am more drawn
towards darker, more creatively underexposed images than creatively overexposed
ones, but it’s down to personal preference.
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