Sony SAL75300 Service Manual page 36

4-2-2. Aperture Diameter Adjustment
Equipment
Equipment
• Luminance Box
• Camera DSLR-A100
• AE Master Lens
• Compact Flash (CF) Card (For image saving)
• Personal Computer (PC)
(Color Calculator 2 installed)
• Adhesive bond (B-10)
Adjusting Method
1) Set the checking lens into the state of Fig.4-2-8 (all exterior parts and 2nd lens set were removed).
2nd Lens Group
Assembly
2) Temporarily attach the bayonet mount set, and set the aperture diameter to smallest opening.
3) Set the zoom to the Wide end position (focal length: 75 mm).
4) Loosen the three screws fixing the pressure plate.
5) Turn the pressure plate so that the inner diameter of the diaphragm blades is 2.6 mm, and tighten the three screws.
Pressure Plate
SAL75300 (4.5-5.6/75-300) (75-300mm F4.5-5.6)
Fig.4-2-8
Screws
Fig.4-2-9
4-7
2.6 mm
Screw