Sony E 10-18 mm f/ 4 OSS Lens Техническое Руководство

4-15

SAL18200 (3.5-6.3/18-200) (DT 18-200mm F3.5-6.3)

2nd Lens Adjustment Washer

• 1000 mm Collimator

• Flange Back Tester

• A-mount Attachment

• Flange Back Gauge (43.50mm)

1)

Perform “4-4-1. Optical Axis Check/Adjustment and Focus-shift/Flange Back Check”, and check that the flange back (f’F) at each

focal length is out of specification of the Table 4-4-1.

1)

Turn the knob of the flange back tester, and set the dial gauge value to the over infinity specification “44.95 mm”.

2)

Set the zoom ring of the checking lens to Tele end position (focal length: 200 mm).

3)

Loosen three screws fixing the 1st lens barrel assembly.

While looking through the eyepiece of microscope, focus by rotating the 1st lens barrel assembly. Then tighten three screws. (Refer

to Fig.4-4-7.)

4)

By rotating the focus ring of 1st lens barrel assembly, align with the infinity mark in Fig.4-4-8.

5)

Set the zoom to the focal length (f = 200 mm) and check the flange back value.

6)

Set the zoom to the focal length (In the middle of f = 100-70 mm) and check the flange back value.

7)

According to the value checked in step 6), choose the 2nd lens adjustment washer in the manner shown below. (Table 4-4-2, Fig.4-4-

9)

• Adjust by repeating steps.

t = ((f’F at f = 200 mm) - (f = f’F in the middle of 100-70 mm))/4

t = “In case of negative”: Increase the thickness of 2nd adjustment washer by the value t.

t = “In case of +”: Decrease the thickness of 2nd adjustment washer by the value t.

A

2-699-034-01

0.2

B

2-699-035-01

0.1

C

2-699-036-01

0.05

D

2-699-037-01

0.03

E

2-699-038-01

0.02

1st Lens Barrel Assembly

Screw

Screw

Screw

Align the center