Polaroid Joshua Vision Service Manual page 67

8. Center the Joshua Horn Assembly on the Star Tester with respect to the Graywall. The camera
lens must be 4.5 feet (137 cm) from the Graywall.
Note: The front of the camera must be parallel to the Graywall and the area visible in its
viewfinder must be free of all objects.
9. Set switch 1 (SW 1) of the Joshua Horn Assembly to its Strobe (STB) position.
10. Slide the camera trim switch to its center (normal) position.
11. Set the Star Tester selector switch to its FLASH EXP position.
Test Procedure
1. Press the camera shutter button.
2. Record readings shown on the STOP ERROR display of the Star Tester.
3. Repeat steps 1 and 2 two more times, recording all reading shown on the STOP ERROR display of
the Star Tester. (Because of the SLR system their is only one reading for every two cycles of the
camera.)
Note: Strobe Specification Limits
4. If the STOP ERROR display readings are not within specifications, perform the Strobe Exposure
Calibration procedure.
-.10 + 0.25 STOP
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