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4-23
SAL35F14G (1.4/35G) (35mm F1.4G)
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 - 44.59mm
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.
6) Build in the backwasher and perform “4-4-1. Confirmation of flange-back (f’F)” again.
Specification
Focal-length f’F (mm)
f(mm) (Infinity position)
35 44.58 to 44.60
Table 4-4-2
7) When the flange back (f’F) is out of specification of the Table 4-4-2, repeat steps 2) to 6) again.
Part No. Description
2-684-123-01 WASHER (A), BACK ADJUSTMENT (t=0.05mm)
2-684-124-01 WASHER (B), BACK ADJUSTMENT (t=0.07mm)
2-684-125-01 WASHER (C), BACK ADJUSTMENT (t=0.1mm)
2-684-126-01 WASHER (D), BACK ADJUSTMENT (t=0.2mm)
2-684-127-01 WASHER (E), BACK ADJUSTMENT (t=0.5mm)