BrickHouse Photo School

Tips, Tricks and Reviews for Photo Hobbyists

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Tips & Tricks: Overexposure

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Digital cameras are technically-advanced and extremely user-friendly. So much so, it’s easy to get accustomed to letting the camera do all the thinking and only take photos in the automatic mode. But why limit yourself? A digital camera is a great tool for exploring your creative side.

For this little exercise in digital photography, we’re going to look at using your camera’s shutter priority function.

Most of the time, shutter priority mode is marked as “Tv” or “S” on the dial. This function allows you to input the shutter speed and the camera sets the appropriate aperture value. Let’s assume you don’t know anything about shutter speeds. That’s fine. You can learn as we go along.

Understanding Shutter Speed
Shutter speed is the time value measurement of the camera. It’s the amount of time light is allowed to strike the image sensor. If the scene you’re photographing is relatively dark, then a slower shutter speed is required because it takes more time for enough light to strike the image sensor to make an image. Alternately, a bright scene would require a faster shutter speed because too much light will make the image too bright – or what’s called overexposed.

Overexposure
For the purpose of this discussion, let’s discuss three levels of light were going to be concerned with: highlights, which are the brightest areas; mid-tones, which are the “middle” or “normal” light levels; and lowlights or shadows.
A “properly” exposed image has a balance between highlights, mid-tones and shadows. If an image is underexposed, it is too dark and details are lost in the shadows. If an image is overexposed, it is too bright and the image looses details in the highlight area.

Hard, directional light from the right side of the image was used for lighting. The shutter speed was set so the image would be overexposed giving it a unique look. (Photo Credit: Jeremy W. Schneider)

Hard, directional light from the right side of the image was used for lighting. The shutter speed was set so the image would be overexposed giving it a unique look. (Photo Credit: Jeremy W. Schneider)

If Overexposure is ‘Wrong,’ Why Use It?
Sometimes it’s OK to break the rules.  Overexposure can add a sense of drama. It can also help give a new way to look at something that’s been photographed many, many times. Furthermore, slight overexposure can really help in portraits where your subject has slight facial blemishes such as acne.
Photography is one of those fields that once you know the rules, it’s perfectly OK to bend or break them. Experimenting with different looks and different techniques is a great way to unleash your own creative potential.

OK, You’ve Convinced Me. Now What?
Overexposure is easy, especially with a digital camera since you get instant feedback. Back in the “old days” when I studied photography, I kept a little notebook with me and recorded shutter speed, aperture and other values of all the pictures I took on film. That way, when I developed the images, I could see what process and what values I liked best. I also bracketed the image, which means I shot each image underexposed, properly exposed and overexposed. That way, I could pick and choose what I liked best for the particular image.
With a digital camera, you can leave the notebook at home. Not only can you instantly see the results, the shutter speed and aperture values are recorded for each image.

Step-by-Step
First, find a good subject. Since you’ll be experimenting with many different exposure values, it’s best to find something inanimate since people get cranky and pets get bored or vice versa. Flowers work really well, especially big, colorful flowers.
Next, take your subject outside on a bright day. Place your subject in a location where the background isn’t too distracting.
Now, put your camera on the “Tv” or “S” setting. Then you need to look at the shutter speed value, which will probably be displayed on your LCD view screen. Consult your owner’s manual to find out how to increase or decrease the shutter speed value. There will be a bar, usually at the bottom of your camera, that tells you if you’re underexposed, correctly exposed or overexposed.
Look at the light meter display on your LCD view screen and take a picture at the “normal” or “proper” exposure level. Then, decrease your shutter speed value and take another picture. Keep this up until you can no longer see the subject on the LCD screen. After you’re finished, look at your images on the computer. If you have image editing software, open the images in the software and start applying minor adjustments to your best images until you get the results you want.

While using overexposure gives you a new tool to use in your photography, it won’t work for every subject every time but don’t be afraid to experiment. Try new techniques whenever you get a chance because you might find a new spin on an old subject.

Good luck and keep shooting!

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Written by jeremyparce

March 16, 2009 at 2:44 pm