Nikon PC-Nikkor 28mm f/4 Manuel d'instruction - Page 11
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Maximum Permissible Shift
m
00
5
2 15
I
08
OJ
Depending on the direction of
shift,
however,
,
t here is
a maximum permissible
shift,
beyond which distortion
may occur in the picture corners, because the film
format is rectangular while image area produced by the
I
•
'_
I
I
I
I
I
-----
1
••
,.
1
.•• ,1 .
.-
.
:
Diagram
1
lens
is circular. The amount of shift permissible
without distortion is indicated in millimeters at each
click-stop on the lens barrel. Shifting beyond these
limits
is
possibl
e,
noneth
eless, if
you
take care to ~~
compose so that any distortion will occur in unim-
~t
portant parts of the picture. The diagrams at right
show the limits based on the direction of shift.
'
H tttITttttn
A B C O E F
G
H
I J
K L A
D iagram 2
Az
imuth
A
t
-f--......
~-.:--+-.-
Max.
adequate
91ift
G
Pic
ture area
when
the lens
is not shifted
11