Read Sony SAL50F14Z Service Manual online
4-4
SAL50F14Z (Planar 1,4/50 ZA) (Planar T*50mm F1.4 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 = -20 to +5
2) When the aperture error is out of specification, perform 4-2-2. Aperture Diameter Adjustment .
4-2-2. Aperture Diameter Adjustment
Equipment
• Universal Wrench
• Chip-A for Universal Wrench
• Adhesive bond (B-10)
• Universal Wrench
• Chip-A for Universal Wrench
• Adhesive bond (B-10)
Adjustment Procedure
1) Disassemble or assemble the lens as shown in Fig. 4-2-8.
1) Disassemble or assemble the lens as shown in Fig. 4-2-8.
1st Group Lens Block Assy
Front Ring
Fig.
4-2-8
2) Remove the adhesive bond and loosen the screws fixing the aperture cam plate.
Remove the adhesive bond
Remove the adhesive bond
Remove the
adhesive bond
adhesive bond
Remove the
adhesive bond
adhesive bond
Fig.
4-2-9
3) Set the Aperture Preset Ring at the aperture open position by moving the preset lever, and fix the Aperture Preset Ring.
Preset lever
Aperture open position
Fig.
4-2-10
4) Move the Aperture Blade Unit of aperture in the position where the Aperture Blade Unit of aperture is completely hidden by the inside
diameter of the aperture cam plate and tighten the screws of the aperture cam plate.
Aperture Blade Unit
Aperture cam plate
Fig.
4-2-11
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