Sony SAL35F14G Over Infinity Infinity End Flange Back f’F Adjustment, Adjusting Method

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)

SAL35F14G (1.4/35G) (35mm F1.4G)

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