Pentax 540FGZ Operation Manual - Page 34
Using the Sync Mode, Leading Curtain Sync Mode, High-Speed Sync Mode, Contrast Control Sync Mode - flash af540fgz
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Using the Sync Mode The AF540FGZ has the following sync modes. Select the mode best suited for the subject. Before photographing, confirm the following. 1. Whether your camera supports the desired sync mode. ➝ Cameras that Support Each Sync Mode (page 62) 2. Whether you can use the desired sync mode with the combination of your camera and the flash mode you have set. ➝Functions Related to Each Flash Mode (page 64 - 71) 3. Restrictions for the use of each sync mode. ➝ Sync Mode Restrictions (page 72 - 76) Leading Curtain Sync Mode This is the most commonly used sync mode. In this mode, the flash discharges at the instant the first shutter curtain completes its travel. You can use this mode with the shutter speed set to the X-sync speed or slower. Refer to page 33 for instructions on how to use this sync mode. Trailing Curtain Sync Mode In this sync mode, the flash is discharged at the instant the second curtain begins its travel. This mode will freeze the subject with a blur appearing after the subject under a slow shutter speed condition. Refer to page 33 for instructions on how to use this sync mode. High-Speed Sync Mode This sync mode will enable flash synchronization with shutter speeds faster than the X-sync speed. Since there is no sync speed limitation, high-speed sync is effective for fill-flash in daylight. Refer to page 34 for instructions on how to use this sync mode. Contrast Control Sync Mode This sync mode enables you to photograph with multiple flash units, utilizing the difference of the light intensity of each flash unit. The ratio of flash light intensity between the flash unit set to this sync mode and the other flash unit is 1:2. Refer to page 36 for instructions on how to use this sync mode. 32