Read Sony SAL24F20Z Service Manual online
4-4
SAL24F20Z (Distagon 2/24 ZA T * SSM) (Distagon T * 24mm F2 ZA SSM)
4) Click the Calculate button to measure the image.
5) After measuring, check the G values.
Average
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)
Calculate button
Check the “G” value
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.
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
2) When the aperture error is out of specification, perform 4-2-2. Aperture Diameter Adjustment .
4-2-2. Aperture Diameter Adjustment
Equipment (Only the specific equipment is listed)
Adhesive bond (B-10)
1. Disassemble or assemble the lenses to the state shown in Fig. 4-2-8.
Rear Lens
Assy Block
Assy Block
Rear Lens
Block Holder
Block Holder
Front Lens Assy Block
Focus Ring, Front Barrel
Assy Block
Assy Block
Name Ring
Fig.
4-2-8
•
2. Remove the adhesive bond (three locations) that bonds the hole washer and the rear lens assy block.
Bond (Three locations)
Hole Washer
Rear Lens
Assy Block
Assy Block
Fig.
4-2-9
3. Set the preset ring at the aperture open position by moving the preset lever, and fix the preset ring.
Set the preset lever
to the open of aperture
to the open of aperture
Preset lever
Fig.
4-2-10
4. Turn the hole washer and adjust its position so that the aperture blades just hide behind the inner diameter of the hole washer.
Adjust hole washer position
so that aperture blades
just hide behind the hole
washer inner diameter.
so that aperture blades
just hide behind the hole
washer inner diameter.
Hole Washer
Fig.
4-2-11
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