Light Leak Tester; Comparalumen Light Levels Table - Polaroid Land SX-70 User Manual

(4) Slide the camera fully onto the horn.
(5) Select the light level desired on the
Comparalumen and slide the horn up against
the appropriate window. (Position the horn so
that the locating pad on the front of the horn
touches the window.)
(6) Insert a remote shutter release cable into
the socket on the right side of the shutter.
(7) Rotate the RANGE switch on the electronics
module to the SX-70 EXP position.
(8) Lift the EXPOSURE-APERTURE MODE
switch to the EXPOSURE position.
(9) Press the remote shutter trip button and
read the exposure on the meter.
(10) Return the
MODE switch to the RESET position.
d. 10.4'' Aperture Measurement
NOTE : This measurement must be preceded
by steps 1 throught of the Ambient Exposure
Measurement procedure, then complete the
following :
(1) Rotate the camera focus wheel to the 10.4''
setting.
(2) Insert a used flash bar into the camera flash
socket and position the spring clip (supplied with
the tester) over the flash bar so the photocell is
covered.
800 cdls/ft²
100 cdls/ft²
50 cdls/ft²
6.25 cdls/ft²
NOTE : On some Comparalumens it has been found necessary to reverse the filters when used
to reduce the 50 cdls/ft² to 6.25 cdls/ft². In this case the filters are labeled so that the proper label
(100 or 6.25) must facing the operator when the filters are used.
Caution : To avoid possible delamination of the filters, do not leave the Comparalumen on at
100 cdls/ft² any longer than necessary. It should not be on any longer than the minute or two
needed to check the camera.
EXPOSURE-APERTURE

COMPARALUMEN LIGHT LEVELS TABLE

- Move the center switch on the Comparalumen to the right to
illuminate the right (high level) screen, No filters are used for the
800 cdls/ft² level.
- Proceed as for the 800 cdls/ft² level, but insert both filters (one
stop down and two stops down) into the slot above the right
(high level) screen.
- Move the center switch to the left to illuminate the left (low level)
screen. No filters are used for the 50 cdls/ft² level.
- Proceed as for the 50 cdls/ft² level, but insert both filters (one
stop down and two stops down) into the slot above the right (low
level) screen.
(3) Select the 800 cdls/ft² on the Comparalumen
and position the camera at the right-hand
screen.
(4) Rotate the RANGE switch to the 10.4''
position.
(5) Place the EXPOSURE-APERTURE MODE
switch in APERTURE position.
(6) Press the remote shutter trip button and read
the aperture in the relative stops, on the meter.
(7) Return the EXPOSURE - APERTURE
MODE switch to the center (RESET) position.
NOTE : If a meter reading goes off scale (greater
than +1 stop), press the +1 stop pushbutton
on the electronics module and read the meter,
adding +1 stops to whatever the meter is
indicating.
4. Light Leak Tester (Figure 3-8)
Caution : When using the light leak tester, always
hold the fixture so the camera is in the uppermost
position witgh the lens pointing down. There is
no latching device on the fixture and the camera
could slide off it the fixture were pointed down.
The light leak tester consists of two checks : the
static test (with the camera in the mirror down or
viewing position) and the dynamic test (with the