Focusing The Camera - Cosina CS-2 Folleto De Instrucciones

FOCUSING THE CAMERA
Y our CS-2's focusing screen includes a central
horizontal split-image rangefinder, which is
surrounded by a microprism collar. (Fig.5)
To focus accurately:
1. Center
the split-image rangefinder on your
key subject and tu rn the focusi ng ring ( 15)
until the upper and lower portions of your
subject become one , clear vertical image.
2. The microprism collar will a) appear frag-
mented when image is entirely out of focus,
b) appear collar shimmer ing but viewable
when image is nearly in focus and c) display
a sharp clear of your subject when it is in
focus . lt is especially useful when there are
no pronounced vertical subject elements on
which to center the horizontal split-image
rangef i nd er .
3. The ent i re focusing screen may be used for
both focus and composition of your photo-
graph.l n as muchas the human eye tends to
ignore mirror differences in sharpness, the
horizontal split-image rangefinder and / or
the microprism collar should always be used
for critical focus.
Fig5
SELECTING LENS APERTURE
The aperture setting determines the near and
far areas in which items other than your key
• subject will remain acceptably sharp. This
"zone of focus" is refered to as depth of field.
Your lens features a depth of field scale (16),
which allows you to select the zone of focus
which will appear in the final photograph .
(Fig.6)
Under normal lighting conditions, selecting a
larger aperture opening (eg : F2.8 or F4) will
allow you to keep your key subject in sharp
focus while eliminating distracting elements in
the foreground or background of your photo-
graph. (Fig.7) Under same conditions, selecting
a smaller aperture opening (eg : F11 or F16)
will allow you to maintain sharp focus on both
near and distant abjects. (Fig.8)
8