Read Sony SAL100M28 Service Manual online
4-11
SAL100M28 (MACRO 2.8/100) (100mm F2.8 Macro)
Optical Alignment
Best alignment
Best alignment
Incorrect aligned
e.g. As the focusing knob is turned, the chart may appear blurry as illustrated.
The cause depends on individual lens.
e.g. As the focusing knob is turned, the chart may appear blurry as illustrated.
The cause depends on individual lens.
Appearance
Allowance
Off center
Within 0.05 mm
Astigmatism
Within 0.04 mm
2. Checking Method
1)
Attach the checking lens to the flange back tester, and set the 1000 mm collimator.
Fig.4-4-3
2)
Set the focus ring of the checking lens to infinity end position while looking through the microscope, and align the optical axis to the
center of the chart image accurately.
3)
Turn the focus ring of the checking lens from near to infinity side until the chart image is the sharpest (red and green color areas are
equal on the chart *).
*: Position in which the color of collimator chart changes from green into red and come into focus.
Also check the optical axis aligns with the chart center. (Refer to Fig.4-4-4.)
Note:
Figure shows example. The cause depends on individual lens.
Fig.4-4-4
4)
Calculate the flange back (f'F) of the checking lens using the following formula, and check that the following specification is
satisfied.
If not, perform “4-4-2. Flange Back (f'F) Adjustment”.
Flange back (f'F) of the checking lens = (Flange back gauge) + (Number of short-pointer revolution) + (Reading of long-pointer)
Specification
Over infinity end: 45.26
± 0.02 mm
5)
After the check is completed, perform “4-5. FOCUS-SHIFT CHECK”.
1000 mm collimator
Checking lens
Ver. 1.3 2008.01
The changed portions from
Ver. 1.2 are shown in blue.
Ver. 1.2 are shown in blue.
Click on the first or last page to see other SAL100M28 service manuals if exist.