Does what your high-priced camera doesn't – Depth Of Field Calculator Review

Depth of field is vital to a picture's success, but largely overlooked by even the most expensive cameras. Autofocus will find something in the viewfinder that will be in focus, and with most cameras you can choose what point must me in focus. But getting that point in focus will only lead to disappointment if something else important is out of focus. Depth of Field Calculator allows you to specify your camera, and then to enter the distance to your point of interest (generally pretty easy to estimate closely enough), your f/stop aperture, and the focal length of your lens. Bingo, back comes the closest point that will be in focus and the furthest. Better yet, if you current settings don't produc a result you need (e.g., a foreground point in focus as well as the horizon), the inexpensive add-in Depth of Field Variants allows you to see how the results change with a tabular range of different distances, or apertures, or lens lengths. Your first few exercises may take a minute or so. But surprisingly soon you'll get a feel for things, and can zero in on the result you want very quickly. No more coming back from a far away vacation with that distant mountain range blurred in your favorite picture, or your wife's face in the foreground a blob.
Review by Bill from DC on Depth Of Field Calculator.