Mamiya PRO 645 manual See Depth-of-field on

Set the desired f/stop on the Aper- ture Ring (A) by aligning the f/number with the red reference dot (B) in the center of the Scale Ring. The Aper- ture Ring has a click stop for each f/ stop. In-between clicks can also be used.

The effect the set f/stop will have upon the picture area can be con- firmed on the Finder Screen.

Move the AM Lever on the lens so that “M” becomes visible - the lens then can be stopped down to the preselected aperture.

*At position “A”, the lens is al- ways stopped down only when the shutter is being released with the aperture being open.

*During normal photography, set the AM Lever so that “A” is visible. At “M”, focusing will be a little difficult.

*When using the AE Prism Finder, be sure to set the AM Le- ver on “A”; otherwise, correct exposure cannot be obtained.

*When aperture has been con- firmed, be sure to reset the AM Lever to “A”.

See “Depth-of-field” on page 25.

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