Sony AMOUNT_LENS Service Manual ▷ View online
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LENS GENERAL ADJUSTMENT GUIDE
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.2-1-7
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 checking lens (b) - Average “G” value of master lens (a)
Specification:
The value differs in model. Refer to the service manual of each model.
2)
When the aperture error is out of specification, perform “Aperture Diameter Adjustment”.
Note:
The adjustment procedure/specification differs in model. Adjust, referring to the service manual of each model.
Calculate button
Check the “G” value
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LENS GENERAL ADJUSTMENT GUIDE
3. FLANGE BACK (f’F) CHECK/OPTICAL AXIS CHECK
3-1.
Setting of Flange Back (f’F)
Equipment
• 1000 mm Collimator
• Flange Back Tester
• A-mount Attachment
• Flange Back Gauge (43.50mm)
1. Preparations
1)
Set the equipment as shown in the Fig.3-1-1.
Fig.3-1-1
2)
Looking through the eyepiece lens, turn the eyepiece ring of the flange back tester so that cross line or scale in the view is the sharpest.
3)
Attach the flange back gauge (43.50mm) securely to the A-mount attachment and hold them together.
4)
Turn the focusing knob of the flange back tester so that fine scratches on the flange back gauge (43.50mm) is the sharpest.
Note:
Turn the knob in the direction of the arrow of Fig.3-1-2 for correct reading.
Fig.3-1-2
5)
Turn the scale ring of the dial gauge until the long pointer indicates “0”.
Note:
This position is the flange back (f’F) = 43.50 mm.
Memorize the position of short-pointer.
Flange back gauge (43.50mm)
A-mount attachment
Objective lens (10x)
Dial Gauge (Min. scale: 0.01 mm)
Scale ring
Eyepiece lens (7x)
Eyepiece ring
Focusing knob
Focus on fine lines on the surface.
Always turn the knob in the arrow
direction for correct reading.
direction for correct reading.
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LENS GENERAL ADJUSTMENT GUIDE
3-2.
Flange Back (f’F) Check/Optical Axis Check
1)
Attach the checking lens to the flange back tester, and set the 1000 mm collimator.
Fig.3-2-1
2)
Set the focus ring of the checking lens to “
∞ (infinity) index or near ∞ (infinity)” and adjust the optical axis, observing the micro-
scope so that the chart can be seen in the center.
Note:
The setting of focus ring differs in model. Refer to the service manual of each model.
3)
Turn the focusing knob of the flange back tester until the chart image comes into focus.
Also check the optical axis aligns with the chart center. (Refer to Fig.3-2-2.)
Note:
Figure shows example. The cause depends on individual lens.
Fig.3-2-2
1000 mm collimator
Checking lens
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.
The changed portions from
Ver. 1.2 are shown in blue.
Ver. 1.2 are shown in blue.
Ver. 1.3 2014.04
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LENS GENERAL ADJUSTMENT GUIDE
4)
Check that the specification of the satisfied.
CB
Phenomenon that seems that color (flared) remains in one direction of ring chart at the best focus.
AS
Phenomenon that seems that color of ring chart divides into direction of cross at the best focus.
Fig.3-2-3
5)
If the specifications of CB and AS are not satisfied, perform “Optical Adjustment”.
Note:
The adjustment procedure/specification differs in model. Adjust, referring to the service manual of each model.
6)
If the specification of flange-back (f’F) is not satisfied, perform “Flange-back (f’F) Adjustment”.
Flange-back (f’F) of the checking lens = (Flange-back gauge) + (Number of short pointer rotation) + (Reading of long pointer)
Note:
The adjustment procedure/specification differs in model. Adjust, referring to the service manual of each model.
CB
AS
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