Yashica MAT-LM - Yashica A and 44 A Operations

DEPTH-OF-FIELD
When you locus the camera on a subject there is a certain distance in Iront
and back 01 the subject within which other object wil l also appear sharp. This
is know as the "Depth-ol-Field", and it varies with the lens aperture. The
smaller the aperture the greater the Depth-ol Field; it is much large' at I: 22
than at I: 3.5.
At the locusing knob is a scale which will indicate the Depth-ol Field when the
camera is locused at various distances. You will notice that an either side 01
the I: 3.5 ngure is a similar set 01 numbers which represent lens apertures.
When the camera is locused on your subject look lor the aperture you are
using an either side 01 the scale to determine the Depth-ol-Field. Thus, il the
camera is locused at 10 leet and the lens aperture is f: 8 the Depth-ol-Field
(area in which all obiect are sharp) is from
about 8 It. to 13 It.
You can also use the depth-ol-neld scale to
use your Yoshico as a fixed-focus camera.
In this case set the innnity mark on the
distance scale opposite the lens aperture being
used. If the aperture is I: 8 you will notice
that all objects Irom about 25 leet to in n nity
will be sharp.