Read Sony SAL135F18Z Service Manual online
4-25
SAL135F18Z (Sonnar 1.8/135 ZA) (Sonnar T
*
135mm F1.8 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)
Adjusting Method
1)
Perform steps 1) to 3) in the confirmation procedure.
2)
Confirm the value of flange back of lens to be checked. This value is called “A”.
Using the formula below, calculate the thickness of FB adjustment washer to be increased or decreased.
Thickness of FB adjustment washer to be increased or decreased= A – 44.92
In case of “+” : Add the FB adjustment washer of thickness calculated by the above formula.
In case of “–” : Remove the FB adjustment washer of thickness calculated by the above formula.
Example)
In case of + 0.1 mm calculated by formula: Add the FB adjustment washer of 0.1 mm thickness.
In case of – 0.1 mm calculated by formula: Remove the FB adjustment washer of 0.1 mm thickness.
3)
Remove the
α mount, and according to the above formula increase or decrease the FB adjustment washer.
Select from 4 types of FB adjustment washer in the table below.
FB Adjustment Washer
Part No.
Description
Thickness(mm)
2-898-012-01
WASHER, FB ADJUSTMENT A
0.02
2-898-013-01
WASHER, FB ADJUSTMENT B
0.03
2-898-014-01
WASHER, FB ADJUSTMENT D
0.1
2-898-015-01
WASHER, FB ADJUSTMENT F
0.2
Table 4-4-2
4)
After replacing the FB adjustment washer, confirm that the specification is met.
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