393.10 Flash PhotographyThe Mamiya 645DF+ is equipped with a vertical-travel focal plane metalshutter and it is also compatible with leaf shutter lenses.The focal plane shutter provides higher shutter speeds than that of leaf(central) shutter lenses. Focal plane shutters allow you to shoot fastenough to freeze moving subject matter. Leaf shutter lenses allow fastershutter synchronization to flash, making it ideal for freezing subjectmovement when using strobe lighting.The focal plane shutter method allows for shutter speeds of up to 1/4000sec When shooting at higher speeds e.g. 1/500 sec the two shutterblades are moving in parallel creating a small slit allowing a small fractionof light to reach the sensor area of the digital back. When using this typeof shutter it is not possible to achieve flash synchronization greater than1/125 sec.A leaf shutter makes it possible to achieve faster shutter and flash syncspeeds. A Leaf Credo series back can sync at maximum shutter speedof 1/1600 second.1. A grip type flashgun or a strobe (with electric contacts other than Xcontact) can be operated with the Mamiya 645DF+ by connectinga sync cord into the camera’s sync terminal. See the note on theleft side of this page about flash units designed exclusively for othercamera makes.2. Turn the exposure mode setting dial to X (1/125 sec) or M (Manual).When M (Manual) is selected, turn the front dial and set the shutterspeed to 1/125 sec or slower.3. Turn the rear dial to set the aperture, and then press the shutterbutton to take a picture.In addition to its standard flash sync system, the Mamiya 645DF+features TTL (through the lens), off the film/sensor (OTF) and electronicflash exposure metering.Notice:This camera’s sync contact isan X contact.Using flashes designedexclusively for other cameramanufacturers in the hot shoemay damage the camera’sinternal mechanisms. In thissituation, use an off-cameraflash bracket and connect async cord to the camera’s syncterminal.When using flashes with a flashduration of 1/500 sec or longer,set the shutter speed to 1/30sec or less.A
