Zenit EM - Page 17

1) The lens diaphragm must be fully open for accurate
focusing. To open it, set the aperture setting lever
on the letter “A”.
2) Aim the camera at the subject and, looking through
the viewfinder, move the focusing ring back and
forth (see figure 18) until you obtain a sharp image
on the ground glass. In the center of this ground
glass, a microprism circle helps to obtain the
sharpest focusing: when this screen is no more
visible, your subject is in focus.
NOTE: Two indexes are shown on the depth-of-field ring
(see figure 19). The line and dot index ( ♦ ) must be
used with color or black and white films. The “R”
index must be used with infra-red films.
To shoot with -ifrp-red film, focus in the usual
way. Then adjust the distance matching the line
and dot index in front of the “R" index. This ad¬
justment will correct the focus for the infra-red
spectrum.
fig 18
fig 19
17