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{}
$
{F
in focus, and read the depth of field scale
m a r k e d
o n t h e l e n s b a r r e l , t h e n y o u c a n d e t e r m i n e
the depth of field that is in focus. The mark
at the center of the depth of field scale indicates
the distance from the camera to the subject in
focus. The two same figures on both sides of
t h e m a r k i n d i c a t e
t h e d e p t h o f f i e l d o r t h e r a n g e
of distance appearing
sharply on the negative.
For example,
the indicated figure of 15 (5)
means 15 feet (5 metres); and when a picture
i s t a k e n a t a n a p e r t u r e o p e n i n g o f F 1 1 , t h e
depth of field ranges from about 10 feet to 30
f e e t ( 3 m t o 1 0 m ) i n d i c a t e d b y t h e t w o
graduations
of 11 on both sides of the O mark.
D i st a n c e
34
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