Pentax ist DL User Manual - Page 51

Using the Built-in Flash 49 Basic Operations Using the Built-in Flash Use the following procedures to take a picture in low light or backlit conditions or when you want to manually use the built-in flash. The built-in flash is optimum at about 0.7 m to 4 m from the subject. Exposure will not be properly controlled and vignetting may occur when used at a distance closer than 0.7 m. (This distance varies slightly 3 depending on the lens being used and set sensitivity. (p.149)) Compatibility of built-in flash and lens Vignetting (darkening of the corners of the image due to a lack of light) may occur depending on the lens being used and the capture conditions. We recommend taking a test shot to confirm this. 1DA, D FA , FA J, FA and F Lens Compatibility with the Built-in Flash (p.151) • When using the built-in flash, remove the lens hood before shooting. • The built-in flash fully discharges for lenses without a function to set aperture lens ring to s (Auto). B Auto discharge b Manual discharge C Auto flash+Redeye reduct D Manl flash+Redeye reduct Camera automatically determines surrounding light and built-in flash pops up and discharges automatically when necessary. (Flash does not discharge even if it is popped up when not necessary.) Discharges flash manually. Flash discharges when popped up, does not discharge when retracted. Light a red-eye reduction light before automatic flash. Discharges flash manually. Light a red-eye reduction light before manual flash. Manual discharge mode (Flash ON) is used regardless of flash mode settings if the K button is pressed to pop up the flash manually.