While taking pictures is easy, especially in this digital world, mastering the art of photography is not always clear and straightforward. There are a lot of variables to factor in and one of them is Depth of Field (DOF). The first barrier that usually makes people's eyes glaze over is that it is a mathematical calculation. It combines a number of different factors including the distance of the camera to the object being photographed, the focal length of the lens, as well as the aperture that is being used.
The ExpoAperture2: Depth Of Field Guide was developed to make this process much easier and much more accessible to the average user. While there are several versions, the one that I am reviewing is the combo pack which contains two ExpoAperture disks. The first covers standard focal lengths (15-135mm), and the second is for telephoto lens lengths (70-600mm).
ExpoAperture is a tool that will allow you to take control over depth of field and let you apply selective focus within your images. This guide will show you the relationship between focal length, focal distance, aperture, and the resulting depth of field and let you make the calculations you need quickly and easily.
Just what is an ExpoAperture disk? It was invented by George A. Wallace as a companion product to the ExpoDisk. Essentially, it is a small hand calculator made of durable plastic that can fit easily into your camera bag or shirt pocket so you can always have it with you.
There are two ways to use ExpoAperture. First is to determine the aperture that will produce your desired depth of field, or to figure your depth of field by your chosen aperture.
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