Getting cozy with a plow bank during rush hour seems like an unlikely place to experiment with depth of field, but after watching a video from B&H I was inspired to try out a few of the latest DoF calculator smartphone apps. Trust me, there are some nice ones out there.
It’s almost a knee-jerk reaction to set your f-stop number to its smallest setting, but that may not be the best option due to the effects of diffraction. It’s a much better idea to do a little figuring to find the optimal setting. These apps can help with that. Plus several of them are free!
If you’ve never used one, most DoF calculators ask you for the model of your camera body (or failing that, a figure called the “circle of confusion” which you can google for your camera model), the focal length of your current lens, the aperture figure, and the approximate distance to your chosen subject. Once you provide the information, the app will give you the distances from you that will be in focus. This is particularly critical if you are planning shooting a landscape.
Exposure Data: ISO 100, f/16, 1″