There are any number of things we can do with a good photo editing program.
And while that is always cool, isn’t it generally a good idea to try to do as much as you can to minimize the need for editing? For example, if you can properly adjust your exposure or white balance during the shooting there is no reason you will have to go back and mess around with it on your computer. The same concept applies to the use of depth of field.
If you’re not sure what I mean, think about the images you see of people, animals, plants…that provide a wonderful clear image of the focal point but sort of seem to blur everything else out.
Cameras are built to automatically allow the sensor to take a shot providing the most crisp and sharp clarity as possible to all elements of the image. Sounds good right? Well, not always. When either the background (or in rare occasions the foreground) can actually distract from the main focal point in the image, you may want to blur if you will, the parts of the image that are not the main subject. This is where depth of field comes in.
If you aim for a shallow depth of field, the foreground will be in focus with the background out of focus to some degree, see the second shot below. Conversely, if you use deep depth of field to blur the foreground and showcase the background.
Take a look at the image of the flowers above as opposed to the one below. The top image is one shot with a camera’s standard settings while the one below blurs the background to emphasize focus on the primary subject by making use of a shallow depth of field.
So, what’s the trick? Well, it’s all about your aperture settings. Basically, the lower the F# (or more widely the opening of the lens) the more you will be able to achieve an effect something like the one above with this stunning pink orchid. So naturally, the higher the F# (or more narrow the opening of the lens) the more you will produce the oppose effect.
For more tips, check out my e-books on digital photography on my official author website.