A camera apparatus (10) has a zoom lens (12) having a zoom focus setting that is adjustable over a range of focus values and control circuitry for generating a variable voltage potential according to the zoom focus setting. A flash illumination apparatus (20) has a light source (26) and a variable focus...http://www.google.com.tw/patents/US20060045501?utm_source=gb-gplus-share專利 US20060045501 - Zoom flash with variable focus lens
