ExpoImaging ExpoAperture, Depth of Field Guide Combo Pack.

ExpoAperture Depth of Field Guide...Sharper Images and Selective Focusing

The ExpoAperture Depth of Field Guide is the simplest and fastest way to determine the best aperture setting for selective focus in any situation with digital SLR, 35mm and medium format (120/220) cameras.

It is calibrated to work with 18mm to 400mm focal length lenses. You can determine the maximum usable aperture and precise focus point for all depth-of-field circumstances. Gain better creative control over your images with the quick reference depth of field guide.

As a tool for the teaching or learning of photography, the Guide is peerless in assisting understanding of one of the most important and least understood areas in photography - depth of field. Because of the simplicity and clarity of its design, and its orientation, it is a great graphic aid in teaching depth of field.

The ExpoAperture Depth of Field Guide allows the photographer to obtain the greatest possible image sharpness where he wants this sharpness, and to determine where that zone of maximum sharpness will begin and end.

The ExpoAperture Guide provides an exceedingly simple, fast and convenient means for determining the right relative aperture number for use with film or digital SLR cameras, with a range of popular focal length lenses, and for a depth of field ranging from 12 inches to infinity.