IntroducingPhotography FAQs, a brand new series from celebrated photographer Chris Weston--author ofDigital Wildlife Photography, Start Taking Great Landscape Photographs,andExposure Handbook. Weston's first entry provides a comprehensive, authoritative, and user-friendly look at the essential subject of exposure. Designed for use with both digital and film cameras, it covers everything from the basics (focal length, depth of field, ISO and ASA numbers)...