Sony SAL135F18Z Service Manual ▷ View 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.
4-26
SAL135F18Z (Sonnar 1.8/135 ZA) (Sonnar T
*
135mm F1.8 ZA)
4-5.
FOCUS-SHIFT CHECK/ADJUSTMENT (APERTURE)
This section describes the check/adjustment of focus-shift amount resulting change of focal-length by aperture setting.
Equipment
• 1000 mm Collimator
• Flange Back Tester
• A-mount Attachment
• Flange Back Gauge (43.50mm)
• Aberration measuring cap 77mm (SAL135F18Z)
1. Preparations
1)
Perform “1. Preparations” of “4-4-1. Flange Back (f’F) Check”.
2)
Set the checking lens focus to the infinite.
2. Checking Method
1)
Set the lens aperture to the open aperture position, and measure the flange back (f’F).
2)
Set the aberration measuring cap 77mm on the tip of lens as shown in the Fig.4-5-1, then measure the flange back (f’F).
Fig.4-5-1
3)
Calculate amount of focus-shift using the following formula, and check that the specification is satisfied.
Note:
The focus-shift amount of the checking lens is difference between the flange back (f’F) of open aperture and flange back
(f’F) reading (using aberration measuring cap 77mm).
Focus-shift = Flange back (f’F) reading (using aberration measuring cap 77mm) - flange back (f’F) of open aperture reading
Specification
Focus-shift (mm) = – 0.05 to +0.13
4)
Perform the “4-11. WRITE dSB”.
Aberration measuring cap 77mm (SAL135F18Z)
Ver. 1.4 2007.12
The changed portions from
Ver. 1.3 are shown in blue.
Ver. 1.3 are shown in blue.
4-27
SAL135F18Z (Sonnar 1.8/135 ZA) (Sonnar T
*
135mm F1.8 ZA)
4-6.
TORQUE RING PLAY ADJUSTMENT
To meet the adjustment conditions below, adjust the amount of play of torque ring.
Adjustment Condition
1)
Observing the focus scale through the distance scale window, move the torque ring in the arrow direction by hand. At this moment,
the focus scale should move following the movement of torque ring without delay.
2)
When turning the coupler at the lens mount side with Philips screwdriver, in all distances from the infinite end to the near end, the
torque ring never rotates and only the focus scale should moves following the movement of coupler without delay.
Adjustment Procedure
If the above adjustment condition is not met, adjust the eccentric pins at three locations.
Fig.4-6-1
Torque Ring
Eccentric Pin
Distance Display Window
Coupler
4-28
SAL135F18Z (Sonnar 1.8/135 ZA) (Sonnar T
*
135mm F1.8 ZA)
4-7.
LENS ROM CHECK
Equipment
• Personal Computer
• Finished Inspection JIG (AC 100 V only)
• Lens Adjustment Program (ActuatorChecker)
1. Preparations
1)
Connected to equipment with checking lens. (Refer to Section 4-1-3.)
2)
Start up of “ActuatorChecker”.
3)
Click
[Set up]
, and perform the initial setting. (Refer to Section 4-1-4.)
2. Checking Method
1)
Click
[ROM Data]
.
Fig.4-7-1
2)
The Serial window appears. Input the lens serial number.
Note:
When
[OK]
is clicked without inputting the serial number, the date executed is displayed on the completion window of each
item.
Fig.4-7-2
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