The Focusing System; Lenses - Polaroid 100 Series Repair Manual

THE FOCUSING SYSTEM
Tltl.' I"ad..
C~nler.!
focusing system is controlled by
the usc of the two focus buttons shown in Fig~
UTe
:-6.
The Jinkage.
consisting ofltle focus bar
assembly. the inner frames and the
U~frdme.
holds
Ih.: shutler housing assembly (containing the
lenses) in place.
When the right focus button
tS
pushed~
the focus
bar assembly moves to the left and pulls the inner
frame with
j1.
The action of the Unkage dr4ws
the shutter assembly toward the camera body,
reducing the focal distance (lens-to-film diStance).
When the left focus button is pushed, tile Jinkage
reacts in the opposite manner and the shutter
housing is moved away from the camera body,
increasing the focal distance.
The focusing linkage controlling lenNe-film dis­
tance is mechanicany coupled to the particular
type of range finder/viewfinder used on the
L"'3mera, A bracket on the focus bar
is
tied
to
a
pick~up
cam in the range finder/viewfinder. The
movement of the cam adjusts the rangefinder/
viewfinder" When the image is in proper focus
according to the rangefinderjviewfinder (or when
the proper distance is shown in the rangefinder),
the
lens is automatrcally set al the right foca!
distance.
On some cameras, II fasf focus decal is mounted
on the Jocus bar assembly. When the focus
but~
Ions
<lfC
moved. the decaJ slides past an indicator
on the camera body. FiduciaJ marks on the decaJ
are lined up with the indicator to lJpproximate
distances from
the
ClJrnera to the subject.
LENSES
There are
two
types of lenses used in the pack
camera. The following models use a two element
(duple!) molded plastic lens:
Model 104
Model'25
MOOeI210
Mod,I21S
Model 220
Model
225
Model 315
Model 320
Glass triple element (triplet) lenses are used in
these models:
MooeilOO Model 230
Model34Q
Model HH Model 240
Model
350
Model 102 Model 250
Model 360
ModeJ"I03
Model 330
Mode1135 Mod.lllS
Both duplet and triplet Jenses have similar charac­
reristics, They are fjS.S COloT-<':OrTected lenses
RFfVF
FAS.T FOCU&
_-IfIf~::-::;;;;;
INOICATOR
FAST FOCUS
DECAL
FOCUSING COMPON
FOCUS 8AR
FIG. '2.6
4