Mamiya 645DF Instructions Manual

Also see for 645DF: Instructions User guide User guide Instructions

Contents

Mamiya 645DF Instructions Manual Manual pdf 37 page image

Depth of FieldDepth of field (D.O.F.) is defined as the zone of sharpness before and behind theplane of focus. It depends on distance to subject, focal length of lens, aperture settingand distance the lens is focused at.In addition to visual observation via the depth of field preview button, the D.O.F. canbe determined by using the depth of field scale on each lens. The f/stop numbersappear on both the right and left side of the white index mark in the center of the scale.Simply read the figures which appear above the f/stop numbers on the distance scaleof the lens. (see illustration below)Depth of Field / Depth of Field PreviewWhen the aperture isstopped down(the subject depth is deep)When the aperture is open(the subject depth is shallow)After focusing, press the preview button.The diaphragm will be stopped down to the setaperture.While operating the preview button, youcannot release the shutter.Depth of Field Preview ButtonWhen the preview button is pressed in, the depth of field for the aperture set on thecamera can be checked by looking through the viewfinder.AFlash PhotographyIn addition to its standard flash sync system, the Mamiya 645DF features TTL (throughthe lens), electronic flash exposure metering. A flash sensor located inside the camerabody reads the flash reflected off the sensor at the moment of exposure. The sensoris connected via the Mamiya 645DFs dedicated hot-shoe to a shoe- or handle-mountstyle Metz flash unit via the Metz SCA 3952 TTL Adapter. Maximum flash sync speedis 1/125 sec., making daytime synchronization possible.To utilize the TTL flash feature with all TTL-operable Metz flash units, a Metz SCA3952 Module is required. Please see the chart below for compatibility and/or additionaladapters that may be necessary.The resulting flash exposure automation determines correct flash exposure andautomatically adjusts the outputof the flash. It also automaticallycorrects for exposurecompensation normally requiredwhen using filters, close-upbellows or extension tubes.1. Mount the SCA3952 adapter onto the Metzflash, insert fully into the camera’s hot shoe,then tighten with the locking knob .2. Set the exposure mode, then check theshutter speed and aperture.With TTL flash photography, the reflection of the flash is metered and the intensityof the flash is adjusted automatically, so TTL flash photography may not be able tosuit to all conditions. In the cases described below, we recommend that you use aflash meter to check the intensity of the flash or to use a manual flash setting.Exposure mode Shutter speed ApertureP Program AEAv Aperture priority AETv Shutter priority AEM Manual modeX Synchro modeAutomatically set by camera to 1/60 sec. whenthe metered shutter speed is 1/60 or slower,and 1/125 when it is 1/125 sec. or faster.Automatically set by camera to 1/125 when theset shutter speed is 1/125 sec. or faster.1/60 to 1/125 sec.Automatically setby cameraAny apertureAutomatically setby cameraAny apertureAny apertureAdapter SCA3952 SCA3000CType of FlashMetz Flash Unit Module ConverterMetz 44 MZ-2 Shoe-mount xMetz 54 MZ-3 Shoe-mount xMetz 45 CL-3 and -4 Handle-mount x xMetz 60 CT-4 Handle-mount x xMetz 70 MZ-5 and -4 Handle-mount x