SAL2470Z2 - Sony Digital Camera Service Manual (repair manual). Page 27

4-13

SAL2470Z2 (Vario-Sonnar 2.8/24-70 ZA SSM II) (Vario-Sonnar T* 24-70mm F2.8 ZA SSM II)

<For reference 2: The example of focusing error amount value check> (Fig. 4-7-5)
Check the displacement between the focus position (peak of image-formation) of the lens to be tested and the focus position (peak of 
image-formation) of the AE master lens.

Example of image shot with lens to be tested (50 mm F1.4)

Example of image shot with AE master lens

Peak area
(existing around 7 to 8 cm
of the rear scale)

Peak area
(existing around 6 to 7 cm
of the front scale)

Error amount = approx. 14 cm

Example of decision:
The lens to be tested has a tendency of backward defocusing compared to the AE master lens. The error amount is approx. 14 cm.
Compare this error amount with the reference value and check whether the error amount is within the acceptable range. 
If the error amount is outside the acceptable range, perform “4-12. FOCUSING ERROR AMOUNT ADJUSTMENT (    SB Writing)”.

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Equipment
• Personal Computer
•  Finished Inspection JIG II (AC 100 V only)
•  Lens Adjustment Program (ACSSM-S-VerXXX.zip)
•  Half Completion JIG

  Please make the Half Completion JIG in each service station.

 

  For details of the jig making method, refer to  4-1-1. List of Service Tools and Equipment  Note 6.

1)  Assemble the checking lens to the half completion condition.

 

Encoder Flexible

Lens

MR Flexible

Motor Flexible

2)  Connected to equipment with checking lens. (Refer to  4-1-4. Connection of Finished Inspection JIG II/Half Completion JIG and 

Startup of Lens Adjustment Program (ACSSM-S-VerXXX) )

3)  Start up the lens adjustment program (ACSSM-S-VerXXX.exe).
4)  Click [Set up], and perform the initial setting. (Refer to  4-1-5. Initial Setting of Lens Adjustment Program (ACSSM-S-VerXXX) )