Sony SAL16105 Service Manual page 69

4-6. FLANGE BACK (f'F) CHECK/ADJUSTMENT
4-6-1. Flange Back (f'F) Check
Equipment
• 1000 mm Collimator
• Flange Back Tester
• A-mount Attachment
• Flange Back Gauge (43.50mm)
1. Preparation
Perform [1. Preparations] of [4-3. OPTICAL AXIS CHECK/ADJUSTMENT].
2. Checking Method
1) Calculate the flange back (f'F) of the checking lens using the following formula, and check that the specification of the Table 4-6-1 is
satisfied.
Flange back (f'F) of the checking lens = (Flange back gauge) + (Number of short-pointer revolution) + (Reading of long-pointer)
Specification
f (mm)
16
24
35
50
70
90
105
Table 4-6-1
2) When the flange back (f'F) of the checking lens is out of specification of the Table 4-6-1, perform "4-6-2. Flange Back (f'F)
Adjustment".
SAL16105 (DT 3.5-5.6/16-105) (DT 16-105mm F3.5-5.6)
f'F (mm)
44.54 to 44.70
44.54 to 44.85
44.54 to 44.90
4-27