Sony SAL28F28 Service Manual page 31

3) Move the preset lever to set the preset ring at the open aperture position.
Set the preset ring at the open aperture position.
Fig.4-2-11
4) Turn the aperture unit holding ring to adjust the position that the iris feather unit are hidden into the edge completely.
Aperture Unit Holding Ring
5) After the adjustment is completed, apply the adhesive bond (B-10) as shown in the Fig.4-2-13.
6) Assemble the lens completely.
7) Perform "4-2-1. Aperture Diameter Check", and repeat "4-2-1. Aperture Diameter Check" and "4-2-2. Aperture Diameter Adjust-
ment" until the aperture error is within the specification.
SAL28F28 (2.8/28) (28mm F2.8)
Preset lever
Iris feather unit are hidden into the
edge completely.
Fig.4-2-12
Adhesive bond
Aperture Unit Holding Spring
Fig.4-2-13
4-8
Adhesive
bond