OOJECTIVE
cENS
I,
MASK
ASSEMBLY
MOVAlILElMAGE
APEATURE PLATE
IMAGE
UNS
-
from
I~FJNITY
tv
ClOSE-UI)
..
for
t'xampll.',
<111
upcnin!,! in
fhl'
opl
ie"
;'1~"'l'ml;l)
.1I1d
1\
~nlk\.'"
mnv,,'S
the
ff'JIUI.'
uownw;Jrt.L
tfm
,,'''[feme
thlt.'
ix'amsplilllt.'r
whkh
rc\!,,'(s,,'S
It
:J~Wln.
Fmm
-
ltOSE~UP
shots.
iI
is
lil'\.·t'S.\;I(Y
to
allow
ii
liltJ,:
(he
tn.'<.lmsplincr.
thc
imag,,'
b:
(dk',:h:lI
to
llw
l'Xfr,J
~pa~e
between
tltt.'
SUQjl'ct
nnd
the
top
r<.lnp:cfinder
eye winllow.
. F!G. 2.9 ZEISS IKON RANGEF!NOERN!EWF!NOER
INTERNAL
CONFIGURATION
7
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
(rame line
beC;lU,\C
the
optics
aJo>-'>embly
\,,',lnoot
tilt t!nough
to
comrenS<lt~
properly.)
R:mgefinder
When looking: through the rangefmder eye window
(when the camera is
out
of
focus). two images are
seen in the small
amber
or purple square. (In some
cameras. this may
be
a circie.) These images resull
from the ability
of
the bearnsr!itter
to
have iight
transmitted through
il
while simultaneouslY hav-
ing light reflected from it. This
pro
pert)' aUows
the viewer
to
observe one image superimposed
upon .mother image.
The
bearnspHtter also has
dichroic characteristics which
impart
color
to
the
reOected
image. One
of
these jmages.,
the
fixed
jma~,
comes directly from the left rangefinder
window and is
transmitted
through
the beam*
splitter
to
the
eye
window.
The
second image;
the movable image. is channeled
through
the right
rangefinder window
to
the movable image
mirror
which reverses it.
The
image is reflected through
BEAMSPUTTliiR
EYE LENS
IMAGE II
r~¢:l
L
MOVABLE
__
J I
IMAGE
Fo.:usmg the
l'a
me
r.l
jlivut~
the Olo\':Jhk
m\a~
..
'
mirror
through a small arc. This
mOVl'm~nt
..
hift'>
the
ima,g.e
left
or
rigllt
on
the
hcam\\J1lill~r.
Wlh.'tI
tht!'
moV".!Me
image
m"'rl:!l'~
with
tile'
fixltu im;;;tl'.
the
I".'amerd
i:i
properly
focusell"
Zeiss
Ikon
Rangefinder/Vrewfindcr
The
Zeiss Ikon r.mgefinderivicwtlnucr
i..,
a
\ingk
window.
projected
frame.
superimrH)lIl".-U
imJ,jl'
..
·
finder.
II
is
used
on
the
Model
~50.
350.
;100
3(,0
came(:Js,
Viewfinder
Figure 2-9 shows
the
internal con:.aruction
of
lhe
Zeiss Jkon r.!ngefinder/viewfinder. Slanln!!, with
the
viewfinder
portion
of
the
as.
...
~ml>ly,
fhe
nx~tl
image
on
the
eye
lens
can
be
seen
to
be
formed
by
the
projection
of
the
image through
the
objt.'i.'*
live lens and
the
beamspliuer.
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