Polaroid SX70 manual Entrance Pupil Test, Aligning the exit pupil gage

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Figure 3-13 Aligning the exit pupil gage

(3)The mounting rails for the gage must be flush with the eyelens frame. Check by holding the bottom of the eyelens frame with the thumb and apply slight pressure in the upper front of the gage with the right index finger. The gage should be secure.

NOTE : A left handed person may find it easier to rerverse the mounting and securing process.

b. Point the camera lens at a light source while holding the viewfinder eyelens (with gage) about18 inches away from your eye.

c. Align the bottom of the viewfinder cap with the horizontal white line on the front of the gage. Center the eyelens supports with the vertical

lines (Figure 3-13).

d.Close one eye and view the exit pupil image in the gage.

e. To be within acceptable limits, the pupil (a bright circular image) must appear in the center of the square opening in the face of the gage. If the pupil is not in the center, adjust the optics system according to instructions in Section IV «Viewfinder Sytem».

2.Entrance Pupil Test

a.Set the focus wheel to 10.4’’.

b.Hold the camera at arm’s lenght, with the taking lens toward you and a bright light source behind the camera.

c.Look through the taking lens, closing one eye. Observe the entrance pupil in the lens.

d.Raise the front of the camera about 10° and note two bright circles against a dark background. Both circles should be verticaly positoned ±.050’’ from the center as shown in Figure 3-14 B.

e.If the circles are not centered vertically (Figure 3-14 A), perform the erecting link adjustment in Section IV.

f.If the circles are displaced horizontally (Figure

3-14 D), make the side to side adjustment of the Fresnel carrier which is included in Section IV.

Figure 3-14 Exit pupil images

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Contents Page Page General Description DescriptionOpening the Camera Camera OperationStarting the Automatic Mechanism Loading the Film packViewing and focusing Setting the exposure counterViewing and shooting Completing the film pack Exposures using flashDeveloping the print Closing the camera Shutter Description Ambient Light Mode11 a Location & Arrangement of internal parts Shutter Description Flash Mode Page 14 S5 being opened by the recock ram Gear train Page Viewing and Exposing System Power SourceIntroduction LensViewfinder optics exposing Fresnel Figures 2-3 a and 2-3 BFresnel screen Camera Elctronics 1. General ViewfinderMirrors Flare baffleSX-70 Switch locations Switch functionsS3 Being opened by recock ram S4 Switch operating configurations Function Sequence Switch Function TablePage Flash Timing Sequence Chart Shutter, exploded view Shutter Mechanical Details FigureA Solenoid S2 operation Sequence of Operations Film Processing ComponentsPage Max Introduction Initial Tests III TroubleshootingSX-70 Cmaera Repair Inspection Procedure Test Equipment Operation Power supply and pack simulator FigureLocation of new collimator target Collimator FigureDisengaging the idler gear Comprehensive tester Comprehensive Testers -6Model B Camera tester Model B Camera Tester Light Leak Tester Figure Comparalumen Light Levels TableLight leak test system Flash Simulator Board Figure10 Manual camera tester Manual Function Tester FigureManual Function Test Sequence Exit Pupil Test Optical System13 Aligning the exit pupil gage Entrance Pupil TestCollimation USE of Analysis ChartsConcave Mirror Distortion Check Fresnel Quality Check16 Fresnel standards chart 18 Flex circuit terminal locations Camera/Shutter Isolation19 Test points on SX-70 shutters Camera Analysis ChartsPage Installation Front COVER/SPREAD Roll AssemblyRemoval Front cover hinge studs Repairs / Adjsutments Loose Front CoversBending the stop latch Top Spread Roll Looseness Interference Between Front and Bottom CoversReplacing the Light Shield Cam Front cover light shield cam Mirror Cover / Boot AssemblyBoot retaining screws