Sony SAL18552 Service Manual ▷ View online
4-4
SAL18552 (DT 3.5-5.6/18-55 SAM Ⅱ) (DT 18-55mm F3.5-5.6 SAM II)
3) Loosen a little two screws and move right and left the preset ring so that the preset ring can move right and left.
4) Observing the light source from the rear lens side, move right and left two screws and tighten two screws at the position where the aper-
4) Observing the light source from the rear lens side, move right and left two screws and tighten two screws at the position where the aper-
ture blades are just completely hidden by the neighboring frame.
Two Screws
Apply the adhesive
bond (B-10)
bond (B-10)
Fig.
4-2-9
5) Perform 4-2-1. Aperture Diameter Check and repeat steps 1) to 4) until the aperture diameter (aperture tolerance) satisfies the specifi-
cation.
6) After finishing the adjustment, apply the adhesive bond (B-10) to the heads of screws tightened in step 4) at two locations.
4-3. PROJECTIVE RESOLVING POWER CHECK/ADJUSTMENT
Equipment (Only the specific equipment is listed.)
• Adhesive bond (B-10)
• Adhesive bond (B-10)
4-3-1. Projective Resolving Power Check
Setting of Lens Test Projector.
Equipment
• Lens Test Projector and Variable Transformer (Output voltage: AC 100 V)
• 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)
• Screen (Art paper)
• Tape Measure
• Plane Mirror (For SLRs)
1. Preparations
1) Perform the following steps (1) to (3), and incorporate the internal lenses of the lens test projector according to the checking focal
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.
(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.
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
Fig.
4-3-1
2) Attach the checking lens to the lens test projector, and set the equipment as shown in Fig. 4-3-2.
3) Turn the fan switch of the lens test projector to ON, then turn the lamp switch to ON.
3) Turn the fan switch of the lens test projector to ON, then turn the lamp switch to ON.
Distance
Lens test projector
Chart
Fan switch
Lamp switch
Plane mirror
Screen
A-mount attachment
Checking lens
F
L
Fig.
4-3-2
4) Turn the focus ring of the checking lens until the chart image projected on the screen is the sharpest at the center (y = 0).
5) Set the plane mirror to the center of the projected image (y = 0), and adjust the projector position so that the mirror reflects the light to
5) Set the plane mirror to the center of the projected image (y = 0), and adjust the projector position so that the mirror reflects the light to
the center of the lens.
4-5
SAL18552 (DT 3.5-5.6/18-55 SAM Ⅱ) (DT 18-55mm F3.5-5.6 SAM II)
2. Projective Resolving Power Checking Method
1) Turn the focus ring of the checking lens until the chart image projected on the screen is the sharpest at the center (y = 0).
2) Read the number of the smallest pitched lines at the center (y = 0).
1) Turn the focus ring of the checking lens until the chart image projected on the screen is the sharpest at the center (y = 0).
2) Read the number of the smallest pitched lines at the center (y = 0).
The number represents for lines per mm.
Sagittal (S)
Meridional (M)
Fig.
4-3-3
3) Rotate the mount rotational plate of the lens projector while observing y = 9, y = 12, y = 15 or y = 18 and stop it at the location where
the projective resolving power is worst (low).
Read the number of the smallest pitched lines (both sagittal and meridional: 3 lines) at the peripheral point.
Note:
Note:
When reading the number of the smallest pitched lines, be careful of the spurious resolution.
Spurious resolution is the reversed image of 2 or 4 lines which appears on screen when focus is beyond maximum revolving power as shown in
Fig. 4-3-4.
Fig. 4-3-4.
Do not confuse spurious resolution for the smallest pitched lines.
Correct resolution
Spurious resolution
Fig.
4-3-4
4) Change the focal length and projected length of the checking lens. (In case of the zoom lens), project the S image and the M image at
each focal point/projected length and confirm that the number of resolution satisfies the specification of the Table 4-3-1.
Specification
Focal length f
(mm)
Distance (m)
Number of the smallest pitched lines/mm
Center (y = 0)
Peripheral (y = 9)
Peripheral (y = 12)
S
M
S
M
18
1.20
100 lines or
greater
40 lines or
greater
32 lines or
greater
32 lines or
greater
25 lines or
greater
35
2.23
55
2.23
Table
4-3-1
5) Check the projective resolving power. If the projective resolving power does not meet the specification, perform 4-3-2. Projective
Resolving Power Adjustment .
4-3-2. 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.
power adjustment.
Improve the projective resolving power in the following procedure.
1. Remove the front decoration plate, front ring and focus rubber ring.
2. Remove one screw fixing the 1st lens barrel block and adjust by rotating the 1st lens barrel block. (It can be rotated every 60 degrees.)
2. Remove one screw fixing the 1st lens barrel block and adjust by rotating the 1st lens barrel block. (It can be rotated every 60 degrees.)
Note:
Even if the 1st lens barrel block is adjusted by rotating, if the specification is not satisfied, replace the 2nd Lens barrel block.
If the specification is still not satisfied, replace the 1st Lens barrel block.
Focus Rubber Ring
Front Ring
Front Decoration Plate
1st Lens Barrel Block
Screw
Fig.
4-3-5
3. Perform the projective resolving power check again and confirm that the specification is satisfied.
4-1-2. Adjustment Flow Chart
4-6
SAL18552 (DT 3.5-5.6/18-55 SAM Ⅱ) (DT 18-55mm F3.5-5.6 SAM II)
4-4. FOCUS-SHIFT (Focal Length)/ FLANGE BACK (f'F) CHECK/ ADJUSTMENT
In this section, the check/adjustment of focus-shift, which arises from the change of the focal length by zooming, is described.
Equipment
• 1000 mm Collimator
• Flange Back Tester
• A-mount Attachment
• Flange Back Gauge (43.50 mm)
• 1000 mm Collimator
• Flange Back Tester
• A-mount Attachment
• Flange Back Gauge (43.50 mm)
4-4-1. Focus-shift (Focal Length)/ Flange Back (f F) Check
1. Preparations
1) Set the equipment as shown in the Fig. 4-4-1.
Flange back gauge (43.50 mm)
A-mount attachment
Objective lens (10x)
Dial Gauge (Min. scale: 0.01 mm)
Scale ring
Eyepiece lens (7x)
Eyepiece ring
Fig.
4-4-1
2) Looking through the eyepiece lens, turn the eyepiece ring of the flange back tester so that cross line or scale in the view is the sharpest.
3) Attach the flange back gauge (43.50 mm) securely to the A-mount attachment and hold them together.
4) Turn the focusing knob of the flange back tester so that fine scratches on the flange back gauge (43.50 mm) is the sharpest.
3) Attach the flange back gauge (43.50 mm) securely to the A-mount attachment and hold them together.
4) Turn the focusing knob of the flange back tester so that fine scratches on the flange back gauge (43.50 mm) is the sharpest.
Note:
Turn the knob in the direction of the arrow of Fig. 4-4-2 for correct reading.
Focusing knob
Focus on fine lines on the surface.
Always turn the knob in the arrow
direction for correct reading.
direction for correct reading.
Fig.
4-4-2
5) Turn the scale ring of the dial gauge until the long pointer indicates 0 .
Note:
This position is the flange back (f F) = 43.50 mm.
Memorize the position of short-pointer.
2. Focus-shift (Focal Length) Check
1) Set the zoom to the TELE end.
2) Set to 44.56 mm by rotating the knob of flange back tester.
3) Focus by rotating the focus ring from the near end side.
4) By rotating the zoom TELE
1) Set the zoom to the TELE end.
2) Set to 44.56 mm by rotating the knob of flange back tester.
3) Focus by rotating the focus ring from the near end side.
4) By rotating the zoom TELE
→
WIDE and WIDE
→
TELE, confirm that the flange back value at each focal length satisfies the
specification.
Note:
Note:
Do not rotate the focus ring.
Specification
Focal Length f (mm)
Flange Back Value f F (mm)
18 to 55
44.56
±
0.12 (44.44 to 44.68)
Table
4-4-1
5) If the flange back value (f F) of the checking lens does not satisfy the specification in Table 4-4-1, perform 4-4-2. Focus-shift (Focal
Length)/Flange Back (f F) Adjustment .
3. Flange Back (f F) Check
1) Set the zoom to the TELE end and the focus to the over infinity end and then check that the flange back satisfies the specification.
2) Set the zoom to the WIDE end and the focus to the over infinity end and then check that the flange back satisfies the specification.
1) Set the zoom to the TELE end and the focus to the over infinity end and then check that the flange back satisfies the specification.
2) Set the zoom to the WIDE end and the focus to the over infinity end and then check that the flange back satisfies the specification.
Specification: Over infinity end
Focal Length f (mm)
Flange Back Value f F (mm)
18 (WIDE end)
44.81
±
0.13 (44.68 to 44.94)
55 (TELE end)
45.98
±
0.54 (45.44 to 46.52)
Table
4-4-2
3) If the flange back value (f F) of the checking lens does not satisfy the specification in Table 4-4-2, perform 4-4-2. Focus-shift (Focal
Length)/Flange Back (f F) adjustment .
4-1-2. Adjustment Flow Chart
4-4-2. Focus-shift (Focal Length)/ Flange Back (f F) Adjustment
1. Preparations
1) Perform 4-4-1. Focus-shift (Focal Length)/ Flange Back (f F) Check and confirm that the flange back (f F) at each focal length does
1) Perform 4-4-1. Focus-shift (Focal Length)/ Flange Back (f F) Check and confirm that the flange back (f F) at each focal length does
not satisfy the specification in Table 4-4-1.
2) Remove the focus ring.
3) Remove the front decoration plate and front ring.
3) Remove the front decoration plate and front ring.
2. Focus-shift (Focal Length) Adjustment
1) Set the zoom to the WIDE end and the focus to the over infinity end.
2) Focus by rotating the knob of flange back tester. At this moment, read the flange back value.
3) Add 1.17 to the read flange back value. Then, rotate the knob of flange back tester so that this added value can be achieved.
1) Set the zoom to the WIDE end and the focus to the over infinity end.
2) Focus by rotating the knob of flange back tester. At this moment, read the flange back value.
3) Add 1.17 to the read flange back value. Then, rotate the knob of flange back tester so that this added value can be achieved.
Example) In case that the read value is 44.80 + 1.17 = 45.97 (mm)
4-7
SAL18552 (DT 3.5-5.6/18-55 SAM Ⅱ) (DT 18-55mm F3.5-5.6 SAM II)
4) Set the zoom to the TELE end.
5) Loosen the screw fixing the 1st lens barrel block and adjust the focus by moving the fixing screw in the arrow direction.
6) Tighten the screw fixing the 1st lens barrel block.
7) Adjust by repeating steps 1) to 6) so that the focus at the WIDE end becomes the same as that at the TELE end.
5) Loosen the screw fixing the 1st lens barrel block and adjust the focus by moving the fixing screw in the arrow direction.
6) Tighten the screw fixing the 1st lens barrel block.
7) Adjust by repeating steps 1) to 6) so that the focus at the WIDE end becomes the same as that at the TELE end.
Screw
Fig.
4-4-3
3. Flange Back (f F) Adjustment
Note:
Perform after completing the Focus-shift (Focal Length) adjustment.
1) Set the zoom to the WIDE end (18 mm) and the focus to the over infinity end.
2) Focus by rotating the knob of flange back tester and read the flange back value.
3) Calculate the amount of increase or decrease of back adjustment washer by the formula below, using the result derived in step 2).
2) Focus by rotating the knob of flange back tester and read the flange back value.
3) Calculate the amount of increase or decrease of back adjustment washer by the formula below, using the result derived in step 2).
Amount of increase or decrease of back adjustment washer (mm) =
Flange back f F (measured value) of focal length 18 mm at over infinity end - 44.81 mm
• In case that the amount of back adjustment washer is negative (-): Decrease the thickness of back adjustment washer.
• In case that the amount of back adjustment washer is positive (+): Increase the thickness of back adjustment washer.
• In case that the amount of back adjustment washer is positive (+): Increase the thickness of back adjustment washer.
4) According to the result calculated in step 3), increase or decrease the thickness of back adjustment washer.
• How to install the Back Adjustment Washer
1
Remove the switch panel block and the rear holding tube assy from the checking lens and make the checking lens as shown in
Fig. 4-4-4.
Back Adjustment
Washers
Washers
Three Screws
Back Adjustment Washers
Back Adjustment
Washers
Washers
Boss
Thin
Thick
Back Adjustment Washer
Part No.
Thickness t (mm)
3-870-687-01
0.05
3-870-687-11
0.1
3-870-687-21
0.25
3-870-687-31
0.3
3-870-687-41
0.35
3-870-687-51
0.4
Fig. 4-4-4
Table 4-4-3
2
Loosen the screws. Then, increase or decrease the thickness of back adjustment washer to meet the thickness of back adjustment
washer which is calculated in step 3), by pushing the back adjustment washers in between the boss and the mount. (3 locations)
Note:
Select 1 to 2 pieces of back adjustment washer to make a combination of specified thickness.
When stacking several pieces of back adjustment washer, install the washers so that the thin one comes at the outer side.
Be sure to use the back adjustment washers of same thickness at three locations.
5) Adjust by repeating steps 1) to 4) until the flange back satisfies the specification.
6) Measure the flange back values at each focal length and confirm that they satisfy the specifications in Table 4-4-1 and Table 4-4-2.
6) Measure the flange back values at each focal length and confirm that they satisfy the specifications in Table 4-4-1 and Table 4-4-2.
4-1-2. Adjustment Flow Chart
4-5. FOCUSING ERROR AMOUNT CHECK
Shoot images with the lens to be tested and the AE master lens under the following conditions (Note 1), and compare the images to check
the error amount (Note 2).
Note 1:
the error amount (Note 2).
Note 1:
・
Shooting magnification (60, 40, 20 times)
・
Chart for checking the depth area of image-formation (tilting chart 2 types)
・
Defocus value 0
±
10
μ
m
Note 2:
The higher the magnification, the focusing error amount becomes the bigger. Therefore, it is easy to judge of result.
If the error amount is outside of the range, perform 4-7-5.
⊿
SB Check/Write .
Equipment
• Chart for checking the depth area of image-formation (40, 60 times)
Acquire the Chart_for_checking_image_formation_40x_60x_(E).zip from the each HQ.
• Chart for checking the depth area of image-formation (20 times)
Acquire the Chart_for_checking_image_formation_20x_(E).zip from the each HQ.
• Software
Acquire the following either software from the each HQ.
Software
Camera
DSLR-A700 Defocus checker
DSLR-A700
Defocus Checker 2
SLT-A37/A57/A58/A65/A77/A99
Table 4-5-1
• Camera (One of DSLR-A700, SLT-A37/A57/A58/A65/A77/A99)
• HASP key
• Personal Computer (supporting Seus-EX)
• AE Master Lens
• HASP key
• Personal Computer (supporting Seus-EX)
• AE Master Lens
J-6082-597-A: 50 mm/F1.7
• Illumination
J-6082-642-A: Fluorescent Lamp (specified color rendering)
J-6082-643-A: Fluorescent Light Stand (high-frequency lighting type)
J-6082-643-A: Fluorescent Light Stand (high-frequency lighting type)
• Memory Card
• Tripod
• Tripod
1. Preparation
1) Insert the memory card to the camera.
2) Set the camera and chart for checking the depth area of image-formation as shown in Table 4-5-2, Fig. 4-5-1 and Fig. 4-5-2.
1) Insert the memory card to the camera.
2) Set the camera and chart for checking the depth area of image-formation as shown in Table 4-5-2, Fig. 4-5-1 and Fig. 4-5-2.
Note 1:
Shooting distance is obtained by shooting magnification and focal length as following.
[Shooting distance] = [shooting magnification]
×
[focal length]
Note 2:
Select the combination according to the Table 4-5-2 Guidelines table.
Note 3:
If the shooting distance using a 60 times chart cannot be ensured indoors, temporarily use a combination of 40 times chart or 20 times chart.
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