Light Reading Range - Contax 159MM Instruction Manual

<Light Reading Range)
The table gives the EV Light reading range for various
lenses, showing the inter-relationship between aperture,
shutter speed and EV (exposure values). For instance,
when an t11.4 lens at ISO 100 is used, the reading range
spanning the points that the vertical lines (EV) and the
horizontal lines (shutter speed) intersect with the diagonal
l i n e s e x t e n d i n g f r o m t h e f v a l u e s o f " 1 . 4 " t o " 1 6 "
(representing the minimum aperture of the Zeiss Planar T*
t|1.4 50 mm), denotes the reading range from EV 0 to 20.
o
EV numbers, which are used to indicate the coupling
range of the light meter, denote the aperture and shutter
speed combinations that yield the same exposure effect
on the film for a given lighting condition
For example, when using EV 13 f rom the scale as a
guide, it can be seen that the same exposure
effect is attained using the combinations of f/16
at 1/30 sec and f/8 at 11125 sec.
Vo, I The EV numbers from O through 20,
3." and the shutter speed f rom 60 to 1/4000
c ,
' " r : ' - ' . ' . ' : r
(.o
se9,. represent the range over which
the camera normally meters in the
AE modes (P, HP, LP and A
modes)
I
That part of the
metering range which is
5oo
shown in cblor
denotes the light
reading range
when using an
tl1 .4 lens at
l s o 1 0 0 .
- - - - - - - - - - - - ' ' ' *
-r 4000
t2 t4
l 6
20