The Black Cat Extended Range Exposure Guide is comprehensive and easy to use. It is being used world-wide by amateur and professional photographers, with digital and film cameras.
This guide is a unique approach to helping photographers determine proper exposure, whether for digital or traditional film shooting. Even though digital cameras will yield a reasonable exposure from the get-go, and the LCD screens they have allow photographers to evaluate exposure quickly, this guide gives you a firm "starting point" for correct exposure.
This can be a real lifesaver when the shot needs to be determined quickly; the Exposure Guide lets you do so without the need for extensive testing and evaluation.