Sony SAL75300 Service Manual ▷ View online
4-16
SAL75300 (4.5-5.6/75-300) (75-300mm F4.5-5.6)
4-5.
FOCUS-SHIFT CHECK/ADJUSTMENT
This section describes the check/adjustment of focus-shift amount resulting change of focal-length by zooming.
4-5-1. Focus-shift Check
Equipment
• 1000 mm Collimator
• Flange Back Tester
• A-mount Attachment
• Flange Back Gauge (43.50mm)
1. Preparations
1)
Perform “1. Preparations” of “4-4-1. Flange Back (f’F) Check”.
2. Checking Method
1)
Check the flange back (f’F) at each focal length (75, 200 and 300 mm) by turning the zoom ring of the checking lens.
Note:
The focus-shift amount of the checking lens is difference between the maximum flange back (f’F) and minimum flange back
(f’F) at each focal length.
Focus-shift = Maximum flange back (f’F) reading - Minimum flange back (f’F) reading
Specification range: 0.1 mm
2)
When the focus-shift amount is over the specification range, perform “4-5-2. Focus-shift Adjustment”.
4-17
SAL75300 (4.5-5.6/75-300) (75-300mm F4.5-5.6)
4-5-2. Focus-shift Adjustment
Equipment
• 1000 mm Collimator
• Flange Back Tester
• A-mount Attachment
• Flange Back Gauge (43.50mm)
• Universal Wrench
• Chip-A for Universal Wrench
• Chip-B for Universal Wrench
Adjusting Method
1)
Measure the flange back at focal length 300 mm (f’t) and 75 mm (f’w) referring to “4-5-1. Focus-shift Check”.
2)
Calculate amount of focus-shift (T) using the following formula.
T:
Amount of focus-shift that should be adjusted by the adjusting washer thickness.
f’t: Flange back value (mm) at focal length (300 mm)
f’w: Flange back value (mm) at focal length (75 mm)
T = (f’t - f’w)/5.28
3)
Adjust the adjusting washer thickness according to the result of step 2). (Refer to Table 4-5-1 and Fig.4-5-1.)
When the focus-shift (T) is a positive value: Increase adjusting washer thickness by the amount of T.
When the focus-shift (T) is a negative value: Decrease adjusting washer thickness by the amount of T.
Adjusting washer
Parts No.
T (mm)
A
2-698-471-01
0.05
B
2-698-472-01
0.06
C
2-698-473-01
0.07
D
2-698-474-01
0.1
E
2-698-475-01
0.2
F
2-698-476-01
0.5
Table 4-5-1
Fig.4-5-1
4)
Perform “4-5-1. Focus-shift Check” again, and repeat steps 1) to 3) until the focus-shift amount is within the specification range.
Adjusting Washer
4-18
SAL75300 (4.5-5.6/75-300) (75-300mm F4.5-5.6)
4-6.
LENS ROM CHECK
Note:
If dialog box of error code appears during the checking, check the reason of error referring to page 4-25.
Equipment
• Personal Computer (PC)
• Camera DSLR-A100
• USB Cord With Connector
• Lens Adjustment Program
Note: Lens Adjustment Program is downloadable from the ESI homepage.
1. Preparations
1)
Connect the checking lens to the camera.
2)
Start the lens adjustment program “LensAdjustment.exe” referring to “4-1-2. Lens Adjustment Program”.
Fig. 4-6-1
2. Checking Method
1)
Click the
[Connect]
button on the lens adjustment program.
Note:
Click the
[End]
button to disconnect the USB connection, then lens adjustment program will terminate.
2)
Check that the display of “Lens Code” and “Model Name” is correct.
Note:
Zoom and focus position setting is not required.
Fig. 4-6-2
3)
Click the
[End]
button to terminate the lens adjustment program.
4)
Turn the POWER switch of the camera to OFF.
4-19
SAL75300 (4.5-5.6/75-300) (75-300mm F4.5-5.6)
4-7.
ZOOM BRUSH POSITION CHECK/ADJUSTMENT AND PATTERN CHECK
Note:
If dialog box of error code appears during the checking or adjustment, check the reason of error referring to page 4-25.
4-7-1. Zoom Brush Position Check
Equipment
• Personal Computer (PC)
• Camera DSLR-A100
• USB Cord With Connector
• Lens Adjustment Program
Note:
Lens Adjustment Program is downloadable from the ESI homepage.
1. Preparations
1)
Connect the checking lens to the camera.
2)
Start the lens adjustment program “LensAdjustment.exe” referring to “4-1-2. Lens Adjustment Program”.
Fig. 4-7-1
2. Checking Method
1)
Click the
[Connect]
button on the lens adjustment program.
Note:
Click the
[End]
button to disconnect the USB connection, then lens adjustment program will terminate.
Fig. 4-7-2
2)
Click the
[Zoom]
button on the lens adjustment program.
3)
Set the zoom position to Wide end, and check that the OK (Green) indicator of “Position” lights as shown in Fig. 4-7-3.
Note:
Lens focus position setting is not required.
Fig. 4-7-3
If the NG (Red) indicator of “Position” lights, perform the “4-7-2. Zoom Brush Position Adjustment and Pattern Check”.
Fig. 4-7-4
4)
Click the
[Exit]
button.
5)
Click the
[End]
button to terminate the lens adjustment program.
6)
Turn the POWER switch of the camera to OFF.
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