Canon PowerShot G12, Where to Focus

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Large landscape scenes are great fun to photograph, but they can present a problem: Where exactly do you focus when you want everything to be sharp? Since our goal is to create a great landscape photo, we will need to concentrate on how to best create an image that is tack sharp, with a depth of field that renders great focus throughout the scene.

I have already stressed the importance of a good tripod when shooting landscapes. The tripod lets you concentrate on the aperture portion of the exposure without worrying how long your shutter will be open. This is because the tripod provides the stability to handle any shutter speed you might need when shooting at small apertures. Set your camera to Aperture Priority mode and the ISO to 80 for a clean, noise-free image.

However, shooting with the smallest aperture on your lens doesn’t necessarily mean that you will get the proper sharpness throughout your image. The real key is knowing where in the scene to focus your lens to maximize the depth of field for your chosen aperture. To do this, you must utilize something called the “hyper focal distance” (HFD) of your lens.

Tack Sharp

Here’s one of those terms that photographers like to throw around. Tack sharp refers not only to the focus of an image but also the overall sharpness of the image. This usually means that there is excellent depth of field in terms of sharp focus for all elements in the image. It also means that there is no sign of camera shake, which can give soft edges to subjects that should look nice and crisp. To get your images tack sharp, use a small depth of field, don’t forget your tripod, use the self-timer to activate the shutter if no cable release is handy, and practice achieving good hyper focal distance when picking your point of focus.

HFD is the point of focus that will give you the greatest acceptable sharpness from a point near your camera all the way out to infinity. If you combine good HFD practice in combination with a small aperture, you will get images that are sharp to infinity.

There are a couple of ways to do this, and the one that is probably the easiest, as you might guess, is the one that is most widely used by working pros. When you have your shot all set up and composed, focus on an object that is about one-third of the distance into your frame (Figure 7.10). It is usually pretty close to the proper distance and will render favorable results.

One thing to remember is that as your lens gets wider in focal length, your HFD will be closer to the camera position. This is because the wider the lens, the greater depth of field you can achieve.

Focusing about a third of the way down the tracks helps to create a nice long depth of field (even with the camera’s middle-ofthe- road aperture of f/4).
Figure 7.10 Focusing about a third of the way down the tracks helps to create a nice long depth of field (even with the camera’s middle-ofthe- road aperture of f/4).


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