Pentax K100D User Manual - Page 166

164 Red-Eye Reduction As with the built-in flash, red-eye reduction is available with an external flash. This may not be available on some flashes or may have restrictions for usage conditions. See the chart on p.160. • The red-eye reduction feature works even when only an external flash is used. (p.57) • If red-eye reduction is used when the external flash is set as the slave unit or with the wireless function, the preflash for red-eye reduction will trigger the external flash. Do not use red-eye reduction when using a slave unit. Function Reference Rear Curtain Sync Flash When using the built-in flash with an external flash (AF540FGZ or 5 AF360FGZ) that is set to the rear curtain flash function, the built-in flash will also use this mode. Confirm that both flash units are fully charged before shooting. Using the Built-in Flash with the External Flash As shown in the figure below, attach the hot shoe adapter FG (optional) to the camera hot shoe and an off-camera shoe adapter F (optional) to the bottom of the external flash, and connect these with the extension cord F5P (optional). The off camera shoe adapter F comes with a tripod screw for securing to your tripod. Only the P-TTL auto flash can be used in combination with the built-in flash. When combining with the built-in flash