Sony SAL24105 Service Manual page 66

Ver. 1.4 2007.12
The changed portions from
Ver. 1.3 are shown in blue.
4) Click the calculate button to measure the image.
5) After measuring, check the "G" values.
Average "G" value of the three images shoot with master lens:
Average "G" value of the three images shoot with checking lens: (b)
3. Checking Method
1) Calculate aperture error using the following formula, and check that the aperture error is within the specification.
Aperture error = Average "G" value of checking lens (b) - Average "G" value of master lens (a)
Specification
Aperture error = –15 to +10 (Wide end: 24mm)
2) When the aperture error is out of specification, perform "4-2-2. Aperture Diameter Adjustment".
SAL24105 (3.5-4.5/24-105) (24-105mm F3.5-4.5)
Calculate button
Fig.4-2-7
(a)
Check the "G" value
4-15