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4-16
SAL24105 (3.5-4.5/24-105) (24-105mm F3.5-4.5)
4-2-2. Aperture Diameter Adjustment
Since the iris blades remain a little in the optical path when the lens is set to the open F value, the aperture diameter changes when zoom-
operated. Therefore, adjust in the procedure below.
Equipment
• Adhesive bond (B-10)
• Iris Open Fixture
• Caliper
1. Preparation
1)
Remove the 2 group lens block from the focus cam tube block and assemble parts shown in Fig. 4-2-8 in it.
2)
Set the zoom to 105 mm.
3)
Attach the maximum aperture jig, and open iris .
Fig.4-2-8
A
A
Fixed Holding Tube Block
Zoom Ring
Lens Mount Block
Rear Light Shield Barrel
Focus Cam Tube Block