Minolta X-700 - Manual (Page 45)

Preview button
In A and M mode, depth of field
at any focused distance and aper-
ture can be checked visually by
pushing the preview button all the
way in. This will stop the dia-
phragm down to the aperture corre-
sponding to the f-number set on the
aperture ring, allowing you to see
through the viewfinder how much
of the subject is acceptably sharp.
NOTE
• The shutter speed indicated by
LED while the preview b u t t o n is
pressed is NOT the actual shutter
speed.
Depth-of-field scale
When the lens is focused at a
given point, the image will be in
satisfactory focus from the nearer
value to the farther value on the
distance scale indicated by the
depth-of-field marks for the aper-
ture in use. For example, if a 50mm
f/1.7 lens is focused at 3m (about
10 ft.) and the aperture is f / 8 , the
corresponding graduations to left
and right of the index indicate
acceptable sharpness from about
2.4 to 4.2m (approx. 8 to 14 ft.).
The depth-of-field scale can also
be used to zone focus, i.e., set the
focusing ring so that some antici-
pated action will take place within
the limits of the depth of field. For
example, if you want any subject
within a range of 2.6m (approx. 8-
1/2 ft.) to infinity to be reasonably
sharp and the lighting conditions
allow you to set an aperture of f/16
in A or M mode with a 50mm f/1.7
lens, set the lens so the i n f i n i t y
mark is opposite the " 1 6 " on the
right end of the scale.
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