Mamiya 645E, Instruction Manual

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13
Depth-of-Field
Depth-of-field is the zone of sharpness in front of and behind the
plane of critical focus.
The distance from the camera to the subject, the focal length of the
lens, the lens aperture, and the distance the lens is focused at
determines the depth-of-field.
In addition to visually observing the depth-of-field, it may also be
determined by reading the Depth-of-Field scale on the lens.
The f/stops are engraved on both sides of the lens’ red Index Mark.
To determine the depth-of-field, read the numbers on the lens that
are opposite the selected f/stop on each side of the red Index Mark.
For example, in the above image, when the lens is focused at 3 meters and the aperture is set to f/22, the depth-
of-field is from 2 meters to 5 meters.
Film Advance
Rotating the Film Advance Crank one complete turn clockwise
advances the film to the next frame and cocks the shutter.
When a roll of film is completely exposed, 15 exposures for 120 film
and 30 exposures for 220 film, the Film Advance Crank disengages.
After the last exposure, turn the crank five or six turns to completely
wind the film’s paper trailer onto the take-up spool.
Unloading Exposed Film
1. After the film’s paper trailer is completely wound onto the take-up spool, open the Back Cover and remove
the Film Insert. The Exposure Counter will automatically reset to its ‘S’ (start) position.
2. Pull the Film Insert’s Spool Clip out and remove the roll of film, making sure that the film’s paper trailer
does not loosen.