From the press release:

New depth-of-field guide from Expoimaging

Flaghead Photographic Limited are pleased to announce the availability of the long awaited NEW Depth-Of-Field Guide from Expoimaging.

Everyone can master depth-of-field with the ExpoAperture Depth-Of-Field Guide, a unique tool which instantly shows the relationships between focal length, focus distance, aperture and resulting depth-of-field. The ExpoAperture2 Guide enables photographers to take control over depth-of-field and to apply selective focus effectively in their photography.

A photographer using the ExpoAperture Depth-of-Field Guide simply selects the camera’s sensor or film size and desired focal length for a given shot. The Guide quickly provides the resulting depth-of-field for a given aperture, or, alternatively, determines the aperture necessary to achieve a desired depth-of-field.

The ExpoAperture Depth-of-Field Guide easily fits into a shirt pocket or camera bag for convenient access when needed. The ExpoAperture Depth-of-Field Guide includes a CD-ROM containing an Instructional Manual, a printed Quick Start Guide, a storage pouch and a sensor format reference chart.

Features:
• Quickly determine aperture setting, depth of field result, or hyperfocal distance
• Focal Lengths from 15mm to 135mm (Standard)
• Distances – from 12 inches to infinity
• Sensor sizes and film formats - from 2x crop factor to 6x6 film

The ExpoAperture Depth-Of-Field Guide is now available at £23.44 inc. Vat. Visit www.flaghead.co.uk for further information and a list of retailers.