Sony SAL1118 Service Manual page 26

3. Turn the cam barrel to arrow direction to set the "Wide" end.
4. Set the focus gear barrel to near end position.
5. Assemble the length groove barrel and outer barrel assy so that the projection of the outer barrel assy fit to the notch of the length
groove barrel.
Notch
SAL1118 (4.5-5.6/11-18) (DT 11-18mm F4.5-5.6)
Cam Barrel
Length Groove Barrel
Outer Barrel Assy
Projection
Focus Gear Barrel
HELP