Front / Rear Dial Lock Function

Mamiya 645 AFD III manual Front / Rear Dial Lock Function, Depth of Field / Depth of Field Preview

Depth of Field / Depth of Field Preview

645 AFD III specifications

Models: 645 AFD III

Depth of Field

How to set dial lock

How to release dial lock

Depth of Field Preview Button

When the Electronic Dial Lock is “On,” all currently set values in “ Av” (Aperture Priority AE), “Tv” (Shutter Priority AE) and “M” (Manual mode) cannot be adjusted with the front or rear dials. This prevents accidental change of shutter speed or aperture values.

Depth of field (D.O.F.) is defined as the zone of sharpness before and behind the plane of focus. It depends on distance to subject, focal length of lens, aperture setting and distance the lens is focused at.

C	F	X
		M
A		Tv
P	v

Press the multiple exposure mode and auto bracketing mode button together for about 1 second so that “On,” flashes on the display.

To release dial lock, press the same buttons as in "How to set dial lock" so that “OF” flashes on the display.

In addition to visual observation via the depth of field preview button, the D.O.F. can be determined by using the depth of field scale on each lens. The f/stop numbers appear 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 scale of the lens. (see illustration below)

When the aperture is open (the subject depth is small)

★The setting will be stored after one second.

C	F	X
		M
A		Tv
A
P	v

When dial lock is set, the dial lock display "L" appears on the external LCD.

When the preview button is pressed in, the depth of field for the aperture set on the camera can be checked by looking through the viewfinder.

★When the dial lock is ON, the shutter speed and aperture will not change even if you turn the front or rear dial.

★When you activate the electronic dial lock, and if you then operate the electronic dial, the dial lock indicator “L” on the main panel blinks for three seconds to show that the electronic dial lock is functioning.

★Dial lock can not be set when the exposure mode is “P” (program AE).

★Even while dial lock is set, the front dial or rear dial can still be used to perform the various settings. (Dial lock is temporarily released.)

After focusing, press the preview button.

The diaphragm will be stopped down to the set aperture.

★While operating the preview button, you can-

not release the shutter.

79		80

The Mamiya 645 AFD III is a substantial piece of photographic equipment that has long earned its place as a favorite among professional photographers and serious enthusiasts. Building upon the success of its predecessors, this medium format camera offers a blend of advanced technology and ergonomic design, making it a robust tool for capturing stunning images.

One of the primary features of the Mamiya 645 AFD III is its medium format film capability, which utilizes 120 or 220 film. This allows photographers to achieve superior image quality with greater detail and a richer tonal range compared to standard 35mm cameras. The camera's 6x4.5 cm frame size is ideal for producing high-resolution images that are perfect for large prints and commercial works.

The AFD III is equipped with an advanced autofocus system, featuring a 5-point autofocus sensor that works efficiently in a variety of lighting conditions. The AF lock feature enables precise focusing on subjects, ensuring that photographers do not miss crucial moments. The camera also supports manual focus for those who prefer greater control over their shots.

Another significant aspect of the Mamiya 645 AFD III is its compatibility with a wide range of interchangeable lenses. Mamiya's extensive line of lenses includes options for wide-angle, standard, and telephoto photography, catering to diverse creative needs. This versatility is enhanced by the camera's electronic aperture control, which allows for smooth adjustments while taking photos.

Built with a durable, all-weather body, the Mamiya 645 AFD III stands up to the rigors of professional use. Its design focuses on user comfort, with intuitive placement of buttons and controls that facilitate quick adjustments on the fly. The camera's clear viewfinder provides a bright, unobstructed view for accurate composition.

The inclusion of an electronic film advance further simplifies the shooting process. The camera can automatically advance the film to the next frame, minimizing the risk of double exposure. Additionally, the Mamiya 645 AFD III features a built-in metering system, allowing for accurate exposure readings in various lighting environments.

For those transitioning to digital photography, the AFD III can be paired with a digital back, making it a flexible choice for both film and digital mediums. This adaptability ensures that photographers can choose the best format for their creative vision.

In conclusion, the Mamiya 645 AFD III is a medium format camera that combines quality, versatility, and user-friendly technology. Its impressive features, robust build, and support for various photographic needs make it an exceptional choice for anyone serious about photography. Whether shooting landscapes, portraits, or commercial work, the Mamiya 645 AFD III provides the tools needed to capture stunning images with precision.

When the aperture is

stopped down

(the subject depth is large)