Minolta XG-7 Owner's Manual page 40

5 m ( a b o u t 1 6 f t . ) a n d t h e a p e r t u r e i s f / 8 , t h e
appropriate graduations to left and right of the
i n d e x o n t h e d e p t h o f - f i e l d s c a l e i n d i c a t e a c -
ceptable sharpness from about 3.4m to 9.7m
( a p p r o x . 1 1 t o 3 2 f t . ) .
lnfrared index
F o r p r o p e r f o c u s w h e n m a k i n g p i c t u r e s w i t h
i n f r a r e d r a d i a t i o n , f i r s t f o c u s y o u r s u b j e c t w i t h
visible light as described above, then attach a
r e d f i l t e r a n d t u r n t h e f o c u s i n g r i n g t o t h e r i g h t
t o a l i g n t h e p o i n t o f p r o p e r f o c u s o n t h e
d i s t a n c e s c a l e w i t h t h e i n d e x d e s i g n a t e d w i t h
s m a l l r e d " R " i n t h e d e p t h - o f - f i e l d s c a l e ' W h e n
m a k i n g c o l o r p i c t u r e s , f o l l o w t h e m a n u f a c t u r e ' s
recommendations to set focus.