TM 5-6675-319-14
c . R o t a t i o n o f t h e n e g a t i v e i n i t s p l a n e.
The negative rotation adjustment
is used to aline the axis of tilt of the negative (at time of exposure) with the
m e c h a n i c a l a x i s o f t i l t o f t h e r e c t i f i e r.
d . N e g a t i v e d i s p l a c e m e n t t r a n s v e r s e t o t i l t a x i s . I n a l l r e c t i f i c a t i o n
problems, the negative must be located in the film stage so that its horizon line
c o i n c i d e s w i t h t h e h o r i z o n l i n e o f t h e r e c t i f i e r s e t t i n g . T h i s r e q u i r e s t h e d i s -
p l a c e m e n t o f t h e p r i n c i p a l p o i n t o f t h e n e g a t i v e , t r a n s v e r s e t o t h e r e c t i f i e r ’s
t i l t a x i s .
7-7
