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4-22
SAL85F14Z (Planar 1.4/85) (Planar T
*
85mm F1.4 ZA)
4-4-2. Over Infinity (Infinity End) Flange Back (f’F) Adjustment
Equipment
• 1000 mm Collimator
• Flange Back Tester
• A-mount Attachment
• Flange Back Gauge (43.50mm)
• Adhesive bond (B-10)
Adjusting Method
1)
Perform “4-4-1. Confirmation of flange-back (f’F)” and confirm that the flange-back value (f’F) of lens does not meet the specifica-
tion in Table 4-4-1.
2)
Adjust the lens focus to the infinite.
3)
Observing the microscope, adjust the focus by turning the knob of flange-back measuring equipment.
4)
Calculate the shift amount by formula below.
Shift Amount (x) = f’F (measured value) at infinite - 44.62mm
x: Shift amount to be adjusted by backwasher
5)
Depending on the result in step 4), adjust the thickness of backwasher. (Refer to Table 4-4-2.)
Note:
Measure the thickness of backwasher with micrometer or calipers.
• When the shift amount (x) is the positive (+) value: Increase the thickness of backwasher by a value of x.
• When the shift amount (x) is the negative (-) value: Decrease the thickness of backwasher by a value of x.
Description
Part No.
T (mm)
Back Adjustment Washer A
2-684-123-01
0.05
Back Adjustment Washer B
2-684-124-01
0.07
Back Adjustment Washer C
2-684-125-01
0.1
Back Adjustment Washer D
2-684-126-01
0.2
Back Adjustment Washer E
2-684-127-01
0.5
Table 4-4-2
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