Sony SAL35F14G Service Manual page 57

1.4/35g; 35mm f1.4g

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4-5.

FLANGE BACK (f'F) CHECK/ADJUSTMENT

Equipment

• 1000 mm Collimator

• Flange Back Tester

• A-mount Attachment

• Flange Back Gauge (43.50mm)

1. Preparations

1) Perform "1. Preparations" of "4-3. OPTICAL AXIS CHECK/ADJUSTMENT".

4-5-1. Flange Back (f'F) Check

1) Calculate the flange back (f'F) of the checking lens using the following formula, and check that the specification of the Table 4-5-1 is

satisfied.

Flange back (f'F) of the checking lens = (SR flange back gauge) + (Number of short-pointer revolution) + (Reading of long-

pointer)

Specification

Focal-length

f'F (mm)

f (mm)

(Infinity position)

Table 4-5-1

2) When the flange back (f'F) of the checking lens is out of specification of the Table 4-5-1, perform "4-5-2. Flange Back (f'F)

Adjustment".

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

44.58 to 44.62

4-18