Zenza Bronica SQ-B Instruction Manual download pdf (Page 17)

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.

A. Distance scales on the Zenzanon-S lenses can be used for focusing

at the required 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 open-

ing or distance and can be utilized for quickly and simply ascertain-

ing 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.

18. Focusing Adjustments

19. Distance Scale and Depth of Field Scale

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Zenza Bronica SQ-B Instruction Manual Page 17