Polaroid SX70 manual Comparalumen Light Levels Table, Light Leak Tester Figure

(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 EXPOSURE-APERTURE 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.

(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

COMPARALUMEN LIGHT LEVELS TABLE

800 cdls/ft²	-	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.
100 cdls/ft²	-	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.
50 cdls/ft²	-	Move the center switch to the left to illuminate the left (low level)
		screen. No filters are used for the 50 cdls/ft² level.
6.25 cdls/ft²	-	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.

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.