Pentax ist *ist Manual - Page 27

25 BASIC OPERATION (PREPARATION) BASIC OPERATION (SHOOTING) General existing light photography Flash photography (using flash 50% of the times) Flash photography (using flash 100% of the times) Bulb exposure time About 50 rolls About 17 rolls About 12 rolls About 5 hours General existing light photography Flash photography (using flash 50% of the times) Flash photography (using flash 100% of the times) Bulb exposure time About 30 rolls About 10 rolls About 5 rolls About 1 hours The above table is based on Pentax measuring conditions and may vary depending on shooting conditions. ✍ MEMO • New CR2 batteries were used under Pentax testing conditions. • Actual battery life and performance may vary drastically depending on usage of autofocus, built-in flash and external conditions such as temperature and freshness of the batteries. • Generally battery performance is temporarily deteriorated as temperature decreases. When the camera is used in a cold environment, keep this product warm by holding it in some protection against cold. Battery performance once deteriorated due to low temperature will be recovered when the batteries are returned to room temperature. • See page 128 regarding battery life when "Battery Grip BG-20" is used. ADVANCED OPERATIONS OTHERS