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Zone Focusing
The focusing system of your RETINETTE I B is designed
f o r t o k i n g p h o i o g r o p h s o f o m o m e n t ' s n o t i c e .
Y o u s i m p l y t u r n t h e k n u r l e d l e n s r i n g ( c ) u n t i l i t i n -
d i c o t e s t h e d i s i o n c e z o n e i h w h i c h t h e m o i n s u b i e c t l i e s .
A t t h e f i r s t p o s i t i o n , t h e t w o b l o c k o r r o w s p o i n t o t
15 ond oo (infinity). Your comero is lhen set for views
f r o m 1 5 f e e t t o t h e f o r d i s t o n c e . T h e m i d d l e p o s i t i o n
i n d i c o f e s m i d - d i s t o n c e , b e t w e e n 8 o n d l 5 f e e t . T h e t h i r d
position is for close-ups between 5 feet ond 8 feet.
T h e d i s t o n c e z o n e i n d i c o t e d b y t h e b l o c k o r r o w s i s c o r r e c i f o r
f / 4 . W i t h s m o l l e r l e n s o p e n i n g s ( e . g . f / 8 ) o n e v e n w i d e r z o n e
w i l l b e s h o r p . B u t o t l o r g e r l e n s o p e n i n g ( I l 2 , B ) i t i s b e t t e r t o
s e t t o t h e t r i o n g l e w i t h t h e b l o c k o r r e d f i g u r e s t h e e x o c l
c o m e r o - t o - s u b i e c t d i s t o n c e .
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