Sony E 10-18 mm f/ 4 OSS Lens Handbuch
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4-6
SAL100M28 (MACRO 2.8/100) (100mm F2.8 Macro)
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:
(a)
Average “G” value of the three images shoot with checking lens: (b)
Fig.4-2-7
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 master lens (a) - Average “G” value of checking lens (b)
Specification
Aperture error = 0
±12
2)
When the aperture error is out of specification, replace the midway move frame block and perform the check again.
Calculate button
Check the “G” value