To help photographers work out depth of field from a given focal length, focus distance and aperture comes a new guide from Expoimaging.

The ExpoAperture2 Depth-of-Field Guide aims to show the depth-of-field for a given aperture or, alternatively, determine the aperture necessary to achieve a desired depth of field.

?A photographer simply selects the camera?s sensor or film size and desired focal length for a given shot,? said a spokesman for UK distributor Flaghead Photographic Limited.

Designed to be small enough to slip into a pocket, the ExpoAperture2 Depth-of-Field Guide costs £23.44 including a storage pouch and sensor format reference chart.

For details visit or call 01202 733 123.

? AP’s Barney Britton will be reviewing this product in an issue due out in early June