Pentax K100D User Manual - Page 158

156 Using Slow-Speed-Sync You can use slow-speed-sync when shooting portraits with the sunset in the background. Both the portrait and the background are captured beautifully. • Slow-speed-sync slows the shutter speed. Use the Shake Reduction function or turn off the Shake Reduction function and use a tripod to avoid camera shake. The picture will also blur if the subject moves. • Slow-speed-sync shooting can also be performed with an external flash. Using b (Shutter Priority) Mode 1 Set the mode dial to b. b (Shutter Priority) mode is set. 2 Use the e-dial to set the desired shutter speed. The background is not properly corrected if aperture value is blinking when shutter speed is set. Set the shutter speed so that aperture value does not blink. 3 Press the K button. 5 The flash pops up. 4 Take the picture. Using a (Manual) Mode 1 Set the mode dial to a. a (Manual) mode is set. 2 Set the shutter speed (under 1/180 sec.) and aperture value to obtain correct exposure. 3 Press the K button. The flash pops up. In a (Manual) mode, you can raise the flash at any time prior to shooting. 4 Take the picture. Function Reference Distance and Aperture when Using the Built-in Flash A set criteria is necessary between the guide number, aperture and distance when shooting with the flash. Calculate and adjust the shooting conditions if flash is not sufficient. Built-in flash guide number Sensitivity Built-in flash guide number ISO 200 15.6 ISO 400 22 ISO 800 31 ISO 1600 44 ISO 3200 62