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Uses of Lenses
Changing Lenses
In removing the lens from the camera, after turning the bayonet ring of the lens to the left, take out the lens.
In mounting the lens, match the red dot of the lens to the red dot on the camera mount Turn the bayonet ring to the right and fasten.
è When mounting, turn the bayonet ring of the lens sufficiently to the left and coincide the red dot and guide pin of the lens.
è Do not change your lens in a strong light. When changing your lenses have the replacement lens at hand. Then quickly change the
lenses in the shade. . . or use your shadow as a shield from direct light.
è There is a pre-set aperture lever at the back end of the lens which opens and closes the aperture. When the lens is removed, be sure to
always put on the dust cap so as to protect the aperture lever.
è If interchangeable lenses are changed while the CdS actuating lever is in locked position, the pre-set aperture lever cannot be
connected to the coupling part on the camera body and the pre-set aperture will not function. Be sure to unlock the CdS actuating lever
when changing interchangeable lenses.
è Do not touch the panicle mirror or the coupling section of the aperture. When not in use for a long time, protect the panicle mirror by
putting on the flange cap.
Distance Scale
The distance scale indicates the distance between the focused subject and the film plane. The scale is necessary for checking the depth
of-field, for infrared photography and flash photography.
è The correct position of the scale, where the distance is a one-digit figure, is in the middle of the figure; if it is a two-digit figure, it is
between the two figures; and if it is a three-digit figure, it is in the middle of the central figure.
Infrared Index " R "
For infrared photography, correction of the distance scale is necessary because the focal position deviates a little from ordinary
photography. Make ordinary focusing first, then adjust that distance scale to the infrared mark " R ". For instance, if the distance reads
10m after focusing, merely shift the 10 scale to " R " position.
è The position of " R " is scaled according to the use of the standard of a film with the highest sensitivity of a wave length of about
800my and infrared filter (for example, KODAK IR 135 film and WRITTEN 87 filter).