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ExpoImaging has introduced the ExpoAperture² Depth-of-Field Guide. The two-disc kit includes a Standard pocket-size calculator that covers focal lengths from 15mm to 135mm and a new Telephoto version that covers 70mm to 600mm. The discs allow photographers to calculate the depth of field for a particular combination of aperture and focal length, or to figure out which aperture must be used to achieve the desired depth of field.

The $29.95 kit comes with a storage pouch for the calculators and is available now from ExpoImaging’s Web site.

Source: feeds.feedburner.com