Zenit KM User Manual - page 7
ZENIT KM User manual, 2003 year
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Direct the camera through the eyepiece of viewfinder to thesubject. Turn on the
camera. If the combination of the diaphragm, shutter speed and photosensitivity of
film provides a correct exposure, green light-emitting diode continuously shines or
blinks.
If the difference between that manual and calculated exposure exceeds one exposure number,
lower red light-emitting diode will shine, informing operator of an exposure error.
The flashing of the upper red light-emitting diode with the continuously
luminous green indicates excess light for this combination of diaphragm, shutter
speed and photosensitivity of film.
The flashing of the lower red light-emitting diode with the blinking green
indicates insufficient light for this combination of diaphragm, shutter speed and
photosensitivity of film.
5.2.3. Mode “B”
This mode is selected by the mode selection switch 5. During photographing in mode “B” the
shutter is opened as long as the shutter release button 4 is pressed. With operation in mode “B” of
camera, as tripod should be used.
5.3. Use of the Diaphragm
The value of the lens aperture is established against the index by turning the aperture setting ring
17. In this case the diaphragm of the lens does not change, but the value to which the diaphragm will
close during shooting is determined.
5.4. Focusing
The camera viewfinder has a composite focusing device, which consists of focusing wedges 29,
microprism collar 30 and a gound glass collar 28. Focusing should be done at all shooting distances
including ∞.
Guide the camera through the eyepiece of the viewfinder to the subject. Turn the lens focusing ring
until the subject is sharply focused. You can use either the ground glass collar 28 or microprism collar
30, or the combination of the upper and lower parts of the image in focusing wedges 29 (combination
of upper and lower parts corresponds to maximum sharpness).
One should remember that the focusing wedges and the microprism collar, which provide the best
possible focusing, are of no use with interchangable lenses having aperture values greater than 4. In
these cases, and also for micro- and macrophotography, focusing should be done on the ground class
collar.
The index, designated by Latin letter “R”, is used when photographing with infra red film. In such
cases focus the image and introduce a correction by bringing the distance figure you have obtained
opposite the index mark “R”.
After focusing, it is possible, using scales 18 and 19, to determine distance from the film to the front
and rear boundaries of the sharply focused area (depth of field). On scale 19 against two identical
numbers of scale 18, corresponding to the aperture that you are going to use, will be two sests of