Zenza Bronica SQ-Am, Руководство пользователя

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A. The lens is focused on the subject, by rotating the focusing ring in either direction, while checking the effect on the microprism /
split-image rangefinder spot in the center of the focusing screen (standard type).
B. The central split-image spot splits the image into two, with the upper and lower halves separated horizontally when the lens is
out of focus. When in focus, however, the two halves will coincide with the displacement disappearing. The microprism ring
surrounding the central spot can also be used for checking the sharpness of the focused image, since the image will glitter when
the lens is not focused. The surrounding full-area matte surface can also be used for checking image sharpness.
1201
Distance Scale and Depth of Field Scale
A. Distance scales on the Zenzanon-S lenses can be used for focusing at the required distance or finding the distance actually
focused. Simply rotate the focusing ring and set the required distance opposite the orange-colored index, which will adjust the lens
for the required distance.
B. There is an apparent zone of sharpness, both in front and back of the focused subject, which is known as the depth of field. The
depth of field scale shows the zone of apparent sharpness at any lens opening or distance and can be utilized for quickly and
simply ascertaining the depth of field. The depth of field scale is next to the distance scales and is made up of identical pairs of
apertures on both sides of the orange-colored distance index. These identical pairs of apertures indicate the distance that will be in
focus at these lens openings. For example, if
the 80mm lens is focused at a distance of 3m, it can be seen from the depth of field scale that the zone will extend from 2 to 7
meters (6 ft. to 23 ft.), when a lens opening of F22 is used.
See the depth of field table for the Zenzanon-S 80mm lens, on page 40.