Sony SAL135F18Z Service Manual ▷ View online
4-17
SAL135F18Z (Sonnar 1.8/135 ZA) (Sonnar T
*
135mm F1.8 ZA)
2)
Remove the mount block, FB adjustment washer and coupler.
Fig.4-2-9
FB Adjustment Washer
Coupler
FB Adjustment Washer (Gold)
Mount Block
4-18
SAL135F18Z (Sonnar 1.8/135 ZA) (Sonnar T
*
135mm F1.8 ZA)
3)
Attach the open JIG.
4)
Move the preset lever to set preset ring at the open aperture position.
5)
Two screws that are the fixation of the function lever in the preset ring are loosened.
Fig.4-2-10
Open JIG
Function Lever
Preset Ring
Screws
4-19
SAL135F18Z (Sonnar 1.8/135 ZA) (Sonnar T
*
135mm F1.8 ZA)
2. Adjusting Method
1)
Observing the iris blades from the lens mount side, adjust the position of function lever so that the iris blades just start to be hidden
completely. Then, tighten the function lever with two screws. (Use the special driver: J-6082-654-A)
2)
Attach the contact flexible and light shield ring block.
3)
Perform “4-2-1. Aperture Diameter Check”, repeat this step until the tolerance of aperture error the specification.
4)
After finishing the adjustment, apply the adhesive bond (B-10) to the heads of two screws.
Adhesive bond (B-10): J-6082-612-A
Fig.4-2-11
5)
Remove the light shield ring block, contact flexible and Open JIG.
6)
Attach the coupler, FB adjustment washer, contact flexible and light shield ring block, assemble the state of near completion.
Apply the adhesive bond (B-10)
4-20
SAL135F18Z (Sonnar 1.8/135 ZA) (Sonnar T
*
135mm F1.8 ZA)
4-3.
PROJECTIVE RESOLVING POWER CHECK
Equipment
• Lens Test Projector and Variable Transformer (Output voltage: AC 100 V)
Note:
Connect the variable transformer (Output voltage: AC 100 V) to the lens test projector.
• A-mount Attachment
• Screen (Art paper)
• Tape Measure
• Plane Mirror (For SLRs)
1. Preparations
Note:
Note:
Check the projective resolving power of the checking lens at the following focal-length and distance.
Focal-length f (mm)
Distance (m)
135
5.4
Table 4-3-1
1)
Perform the following steps (1) to (3), and incorporate the internal lenses of the lens test projector according to the checking focal-
length.
(1) Open the lid of the lens test projector.
(2) Pull up and turn the fixed levers on the right and left sides of the lens test projector.
(3) Remove or insert the lens.
Note:
Be sure to have the right position and direction of the lens.
Fig.4-3-1
Lens test projector
Incorporate of the lenses
according to the checking focal-length (f).
according to the checking focal-length (f).
Lens
Fixed lever
Fixed lever
Lid
f=18 to 35 mm
f=35 to 100 mm
f=100 to 200 mm
f=200 to 300 mm
Heat-absorbing filter
Chart
Chart
Chart
Chart
Filament
Filament
Filament
Filament
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