Polaroid 100 Series Repair Manual page 24

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FIG. 3.4 INFINITY TUBE TARGET
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Triplet Lenses - If the 40 lines/mm grouping is
not clear. coUimate the lens accordlng to pro.­
cedures in Section V,
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7. RF/VF Infinity Check (Range
&.
Topside):
(This procedure does not apply to image
sizers, After checking lenses on cameras with
image sizers, aim the fixture toward a plain
background and look through the image sizer
window. Move the focus bar from the
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CLOSE·UP to the INFINITY position. The
movable hor-izontal line in the image sizer
should
mOlle
up to butt against or merge with
the fixed honzontalline. Also, no portion of
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the fixed line may be vi..ible below the mova­
ble line.
If
necessary. adjust image siler range
as instructed in Sect jon V.) After the tens has
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been ched:ed at jnfinity, look at the tube tar ­
get thrOUgh the RF/VF focusing window,
Move the focus bar to CLOSE~UP. Note that
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the target moves becoming two separated jrn
M
ages (Figure 34A), Move the focus. bar back
to INFINITY. The honzontal and vertical
lines of the target should butt or be superim ­
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posed. If they do not, perform the RF/VF
Range/Topside adjustments. in Section V.
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8. Four Foot Check: After the lens and RF/VF
have been checked at infinity, swing the cam·
era around to the four foot target. While look­
ing through the focal plane plate loupe, move
the focus bar toward
CLOSEMUP.
SlOp when the image is sharpest This indi ­
cales that the camera is set at four
feet
Now.
iook through the RF/VF eye window. The
vertical and horizontal lines of the larger crosS' ­
hair target (Figure 3-5) should
be
merged, If
they are not. perform the range/topside adjust ­
ments in Section V, Then, repeat the infinity
cheek,
CROSSHAIRS
HOUtO
900
MERGE
1106
~
AT 4 fEET
ONLY
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FIG. 3.5 FOUR FOOT TARGET
17