Sony SAL1635Z Service Manual ▷ View online
4-6
SAL1635Z (Vario-Sonnar 2.8/16-35 ZA T
*
SSM) (Vario-Sonnar T
*
16-35mm F2.8 ZA SSM)
3)
Set the zoom to the TELE end.
4)
Rotate the focus ring to over-infinity side and by turning further from the infinity end set it at the position where the decentering
roller (decentering, no decentering) can be seen through the hole for decentering roller.
5)
Adjust by rotating two pieces of decentering roller so that CB is eliminated.
6)
After adjustment, tighten two screws to fix the decentering rollers.
7)
After finishing the optical axis adjustment and the focus-shift adjustment, apply the adhesive bond (B-50) to the decentering roller
(decentering, no decentering) and the 2nd lens holder.
8)
Perform “4-3-1. Optical Axis Check”. If the optical axis does not meet the specification, perform repeatedly steps 2) to 6).
9)
In case that the value satisfies the specification, perform “4-5-2. Focus-shift/Flange Back (f’F) Adjustment”.
4-7
SAL1635Z (Vario-Sonnar 2.8/16-35 ZA T
*
SSM) (Vario-Sonnar T
*
16-35mm F2.8 ZA SSM)
4-4.
PROJECTIVE RESOLVING POWER CHECK/ADJUSTMENT
Perform after completing the focus-shift check/adjustment.
Equipment
• 1000 mm Collimator
• Flange Back Tester
• A-mount Attachment
• Flange Back Gauge (43.50mm)
• Resolving Power ADJ JIG
• Adhesive bond (B-50)
• L-shaped hex. wrench (0.89mm)
4-4-1. Projective Resolving Power Check
1.
Perform “LENS GENERAL ADJUSTMENT GUIDE 4. PROJECTIVE RESOLVING POWER CHECK”.
Specification
Focal length
Distance
Number of the smallest pitched lines/mm
f (mm)
(m)
Center (y' = 0)
Peripheral (y' = 15)
Peripheral (y' = 18)
S
M
S
M
16
0.96
125 lines
40 lines and more
40 lines and more
32 lines and more
24
1.33
and more
25 lines and more
40 lines and more
32 lines and more
25 lines and more
35
1.84
32 lines and more
25 lines and more
32 lines and more
Table 4-4-1
2.
Check the projective resolving power. If the projective resolving power does not meet the specification, perform “4-4-2. Projective
Resolving Power Adjustment”.
4-4-2. Projective Resolving Power Adjustment
Check the projective resolving power. If the projective resolving power does not meet the specification, perform the projective resolving
power adjustment.
1. Projective Resolving Power (Partial Blur: WIDE) Adjustment
1)
Remove the rear light shield barrel in the finished state.
2)
Loosen a little bit screws fixing the 5th lens block assy.
3)
Check the projective resolving power at the WIDE end (16mm).
4)
Adjust by shifting the 5th lens block assy so that the projective resolving power meets the specification.
Note:
Move the 5th lens block assy in the direction to which the projective resolving power becomes the front focus tendency so that
the partial blur is improved.
Ver. 1.2 2009.03
The changed portions from
Ver. 1.1 are shown in blue.
Ver. 1.1 are shown in blue.
4-8
SAL1635Z (Vario-Sonnar 2.8/16-35 ZA T
*
SSM) (Vario-Sonnar T
*
16-35mm F2.8 ZA SSM)
5)
After adjustment, tighten screws to fix the 5th lens block assy.
Fig.4-4-1
2. Projective Resolving Power (Curvature of Field: WIDE) Adjustment
Adjust this lens so that the center of maximum projective resolving power comes 5cm before with respect to the focal point of the
peripheral at the WIDE end.
Check the projective resolving power. Check whether the center of the projective resolving power locates forward or backward with
respect to the focal point of the peripheral.
1)
Disassemble the lens to the extent shown in Fig.4-4-2 (Optics Block Assy) and install the resolving power ADJ JIG, rear outer block
assy, back adjustment washers (all of the inserted ones) and mount block assy.
2)
Adjust the focus at the WIDE end (16mm) so that the maximum projective resolving power of the lens center comes 10cm before the
focal plane of the lens peripheral.
Note:
Adjust the focus using the lever bundled with the resolving power ADJ JIG.
Do not change the focus point until the adjustment in step 8) is completed.
(Fix tentatively the lever with a tape.)
Place other screen chip (art post paper) at 10cm before the focal plane of the lens center so that the adjustment can be efficiently
performed.
3)
Confirm the location where the peripheral locates with respect to the center in the maximum projective resolving power.
(How far it is isolated from the plane of projection and whether it locates in front or back of the plane of projection)
Note:
Place other screen chip (art post paper) at the focal plane of lens peripheral and move it back and forth so that the confirmation
can be efficiently performed.
4)
Loosen the screws fixing 4th lens block assy with L-Shaped Hex. wrench (0.89mm).
Fig.4-4-2
Rear Light Shield Barrel
Six Screws
Mount Block Assy
Rear Outer
Block Assy
Block Assy
Resolving Power ADJ JIG
(J-6082-705-A)
(J-6082-705-A)
(Lever)
* Insert it into the U-shaped groove
of the focus lens holder.
* Insert it into the U-shaped groove
of the focus lens holder.
Optics Block Assy
L-Shaped Hex. Wrench
(0.89 mm)
(0.89 mm)
Back adjustment washers
(all of the inserted ones)
(all of the inserted ones)
Ver. 1.2 2009.03
The changed portions from
Ver. 1.1 are shown in blue.
Ver. 1.1 are shown in blue.
4-9
SAL1635Z (Vario-Sonnar 2.8/16-35 ZA T
*
SSM) (Vario-Sonnar T
*
16-35mm F2.8 ZA SSM)
5)
Adjust by rotating the 4th lens block assy as follows.
Tighten the 4th lens block assy (forward): The peripheral moves backward with respect to the center.
Loosen the 4th lens block assy (backward): The peripheral moves forward with respect to the center.
* Target: The plane of projection moves 3cm when rotating the 4th lens block assy by 1/4th turns.
* Reference location: Location where the 4th lens block assy is loosened by rotating by one turn after tightened once.
6)
Fix the 4th lens block assy by tightening the screws loosened in step 4).
7)
Confirm the focus points of center and peripheral in the projective resolving power.
8)
Adjust by repeating steps 4) to 7) so that the maximum projective resolving power of the lens center comes 5cm before that of lens
peripheral.
Fig.4-4-3
3. Projective Resolving Power (Partial Blur: TELE) Adjustment
1)
Remove the front lens barrel block assy in the finished state.
2)
Remove the 1st guide pin and the adhesive bond.
3)
Install the 1st guide pins and tighten them.
4)
Loosen a little bit the G1 holding washer fixing the 1st front lens barrel block assy.
5)
Check the projective resolving power at the TELE end (35mm).
6)
Adjust by shifting the 1st front lens barrel assy so that the projective resolving power satisfies the specification.
Note:
Move the 1st front lens barrel assy in the direction to which the projective resolving power becomes the front focus tendency so
that the partial blur is improved.
7)
After adjustment, tighten the G1 holding washer to fix the 1st front lens barrel assy.
8)
Apply the adhesive bond (B-50) to the gap (ring-like portion) between the 1st guide pin and the 1st lens holder.
9)
Apply the adhesive bond (B-50) to the oblong hole of 1st lens holder.
Fig.4-4-4
10) In case that the projective resolving power (Partial Blur: WIDE) (Curvature of Field: WIDE) adjustment is performed, check the
projective resolving power again.
In case that the projective resolving power (Partial Blur: TELE) adjustment is performed, perform “4-5-2. Focus-shift/Flange Back
(f’F) Adjustment”.
4th Lens Block Assy
Tighten
Loosen
Apply the adhesive bond (B-50)
Universal wrench
J-6082-609-A
J-6082-609-A
Front Lens Barrel Block Assy
G1 Holding Washer
Front Decoration Ring
Chip-A for
universal wrench:
J-6082-609-1
universal wrench:
J-6082-609-1
1st Guide Pin
Oblong Hole
1st Lens Holder
1st Guide Pin
Ver. 1.2 2009.03
The changed portions from
Ver. 1.1 are shown in blue.
Ver. 1.1 are shown in blue.
Click on the first or last page to see other SAL1635Z service manuals if exist.