Sony AF DT 55-200 mm f/ 4-5.6 SAM Lens マニュアル

4-27

SAL55200 (DT 4-5.6/55-200) (DT 55-200mm F4-5.6)

• 1000 mm Collimeter

• Flange Back Tester

• A-mount Attachment

• Flange Back Gauge (43.50mm)

Perform “4-5-1. Focus-shift/Flange back (f'F) Check” and confirm that the flange back value (f’F) of lens to be checked does not meet the

specification in Table 4-5-1.

1)

Set the 1000 mm Collimator to 44.56 mm.

2)

Set the zoom to TELE end (f = 200 mm), turn the focus ring to focus.

3)

Set the zoom to WIDE end (f = 55 mm), turn the knob of flange back tester to focus.

4)

Read the flange back values (f’F) of WIDE end, using the formula below, calculate the shift amount.

Shift amount of back adjustment washer (t) (mm) = f’F (measured value) with focal length “55 mm” at the infinity end - 44.56

5)

According to the result in step 4), adjust the thickness of back adjustment washer.

Be sure to measure the thickness of back adjustment washer with a micrometer (or a caliper).

• In case of negative value (-) of back adjustment washer (t), make the back adjustment washer thinner by (t).

• In case of positive value (+) of back adjustment washer (t), make the back adjustment washer thicker by (t).

3-277-057-01

Back Adjustment Washer

0.50

3-277-057-11

Back Adjustment Washer

0.30

3-277-057-21

Back Adjustment Washer

0.10

3-277-057-31

Back Adjustment Washer

0.05

3-277-057-41

Back Adjustment Washer

0.04

3-277-057-51

Back Adjustment Washer

0.03

3-277-057-61

Back Adjustment Washer

0.20