Sony SAL2470Z2 Service Manual ▷ View online
4-11
SAL2470Z2 (Vario-Sonnar 2.8/24-70 ZA SSM II) (Vario-Sonnar T* 24-70mm F2.8 ZA SSM II)
4-7. 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 4-12. FOCUSING ERROR AMOUNT ADJUSTMENT (
⊿
SB 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 4-7-1
• 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 4-7-2, Fig. 4-7-1 and Fig. 4-7-2.
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 4-7-2, Fig. 4-7-1 and Fig. 4-7-2.
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 4-7-2 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.
3) Connect the camera and personal computer (when using HASP Key) with USB cable and activate Defocus Checker 2 or DSLR-A700
Defocus checker.
In case Defocus Checker 2 is used, click [Connect] to set connection mode.
Note:
Note:
If an abnormal phenomenon appears during installation of the teleconverter used by the user, install the user s teleconverter.
Guidelines Table
Selection of
Shooting magni-
fication
Shooting magni-
fication
AF Assist Chart (Size)
Refer to Fig. 4-7-1.
Refer to Fig. 4-7-1.
Applicable Cam-
era (image sensor
type)
era (image sensor
type)
Applicable Lens
Calculation example of shoot-
ing distance
[shooting magnification]
ing distance
[shooting magnification]
×
[focal length] = [shooting dis-
tance]
tance]
60 times
(middle distance)
(middle distance)
AF Assist Chart 60 Times
(200 mm
(200 mm
×
100 mm)
APS-C size type
All
60 times
×
50 mm = 3000 mm
40 times
(middle distance)
(middle distance)
AF Assist Chart 40 Times
(132 mm
(132 mm
×
66 mm)
35 mm full size type
All
40 times
×
50 mm = 2000 mm
20 times
(short distance)
(short distance)
AF Assist Chart 20 Times
(66 mm
(66 mm
×
33 mm)
both size available
• Macro lens
• Lens with a focal
• Lens with a focal
length of more
than 300 mm
than 300 mm
20 times
×
300 mm = 6000 mm
Table
4-7-2
(100 mm)
(66 mm)
(33 mm)
(200 mm)
(132 mm)
(66 mm)
AF Assist Chart
60 Times
60 Times
AF Assist Chart
40 Times
40 Times
AF Assist Chart
20 Times
20 Times
Fig.
4-7-1
Camera Setting
Exposure mode
Focus Mode
Focus Area
Focus Mode
Focus Area
Image Size
Super SteadyShot
Drive Mode
Super SteadyShot
Drive Mode
: A (Open Aperture)
: MF
: Spot Focus Area
(Fixed at the center)
: L
: OFF
: Self-timer
: MF
: Spot Focus Area
(Fixed at the center)
: L
: OFF
: Self-timer
Shooting distance
Set the optical axis to the center
of the AF assist chart.
of the AF assist chart.
AF Assist Chart
(60 Times/40 Times)
(60 Times/40 Times)
Chart for checking the depth area of image-formation
(60 Times/40 Times)
(60 Times/40 Times)
Fig.
4-7-2
4-12
SAL2470Z2 (Vario-Sonnar 2.8/24-70 ZA SSM II) (Vario-Sonnar T* 24-70mm F2.8 ZA SSM II)
2. Shooting procedure
1) Click the [Start] of Defocus Checker 2 or DSLR-A700 Defocus checker to start the measurements.
2) Adjust defocus value to obtain 0
1) Click the [Start] of Defocus Checker 2 or DSLR-A700 Defocus checker to start the measurements.
2) Adjust defocus value to obtain 0
μ
m in the manual focus mode.
The tolerance is 0
±
10
μ
m . (Fig. 4-7-3)
3) Click the [Stop] of Defocus Checker 2 or DSLR-A700 Defocus checker.
4) Shoot an image by self-timer.
5) Perform the steps 1) to 4) by using the AE master lens and the lens to be tested.
4) Shoot an image by self-timer.
5) Perform the steps 1) to 4) by using the AE master lens and the lens to be tested.
Note 1:
Shoot images with the AE master lens and the lens to be tested using the same camera.
Note 2:
Perform entire work within 10 minutes because values become unstable as the camera temperature increases.
If the work continues for 10 minutes or longer, cool down the camera and then restart the work.
Note 3:
Since focusing error amount increases in shooting images at a middle or long distance, comprehensive focusing error amount cannot be
determined correctly only by results with short-distance setting. If the shooting distance using a 60 times chart cannot be ensured indoors,
take either of the following methods.
determined correctly only by results with short-distance setting. If the shooting distance using a 60 times chart cannot be ensured indoors,
take either of the following methods.
Method 1
Use 35 mm full size type camera (SLT-A99) and 40 times chart. (When using the 40 times chart, shooting distance can shorten to 2/3 of 60
times chart.)
times chart.)
Method 2
Check the focusing error amount of short distance using 20 times chart temporarily. After that, shoot the something images outdoors in the
middle distance for using 60 times chart, and then check the focusing amount of middle distance.
middle distance for using 60 times chart, and then check the focusing amount of middle distance.
Defocus Checker 2
(For SLT-A37/A57/A58/A65/A77/A99)
(For SLT-A37/A57/A58/A65/A77/A99)
DSLR-A700 Defocus checker
(For DSLR-A700)
(For DSLR-A700)
In case Good (0
r less than 10 Pm), frame
of waveform area displays in green.
In case Good (0
r less than 10 Pm), frame
of waveform area and defocus value display
in green.
in green.
Fig.
4-7-3
3. The focusing error amount check
1) Open the images shot with the lens to be tested and the AE master lens by the image display software on the PC. (Display the images
1) Open the images shot with the lens to be tested and the AE master lens by the image display software on the PC. (Display the images
at the same pixel magnification.)
2) Check the displacement between the focus position (peak of image-formation) of the lens to be tested and the focus position of the AE
master lens. (Refer to Fig. 4-7-4 and Fig. 4-7-5.)
3) Compare the error amount in step 2) with the reference value of Table 4-7-3 and check whether the error amount is within the accept-
able range. If the error amount is outside of the range, perform 4-12. FOCUSING ERROR AMOUNT ADJUSTMENT (
⊿
SB Write) .
Reference value:
Focal length/
24 - (70 mm)
Distance
(mm)
1.4 m (20 times)
18
2.8 m (40 times)
74
4.2 m (60 times)
166
Table
4-7-3
<For reference 1: shooting image by AE master lens> (Fig. 4-7-4)
• Assume it standard image in the setting environment.
• If the peak of image-formation is to equal distance with AF assist chart position, it is ideal. In actual fact, the image of before and
• Assume it standard image in the setting environment.
• If the peak of image-formation is to equal distance with AF assist chart position, it is ideal. In actual fact, the image of before and
behind the peak is displayed. (Because the environment, the individual difference of camera and lens conditions are combined.)
• The image of before and behind the peak, assume it reference standard image.
• When shooting the image with sharpness setting of the camera to + side, it is easy to distinguish the peak of imaging area remarkably.
• When shooting the image with sharpness setting of the camera to + side, it is easy to distinguish the peak of imaging area remarkably.
Enlargement of same pixel magnification
Example of image shot with
a certain AE master lens under
a certain environment.
a certain AE master lens under
a certain environment.
Identifying the peak position of
image-formation:
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&HQWHURIDUHDZLWKOHVVFRORUIRJJHG
- Front defocus area: Magenta fogged
- Rear defocus area: Green fogged
image-formation:
&HQWHURIVKDUSHVWDUHD
&HQWHURIDUHDZLWKOHVVFRORUIRJJHG
- Front defocus area: Magenta fogged
- Rear defocus area: Green fogged
Example where peak position accidentally matches
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Fig.
4-7-4
4-13
SAL2470Z2 (Vario-Sonnar 2.8/24-70 ZA SSM II) (Vario-Sonnar T* 24-70mm F2.8 ZA SSM II)
<For reference 2: The example of focusing error amount value check> (Fig. 4-7-5)
Check the displacement between the focus position (peak of image-formation) of the lens to be tested and the focus position (peak of
image-formation) of the AE master lens.
Check the displacement between the focus position (peak of image-formation) of the lens to be tested and the focus position (peak of
image-formation) of the AE master lens.
Example of image shot with lens to be tested (50 mm F1.4)
Example of image shot with AE master lens
Peak area
(existing around 7 to 8 cm
of the rear scale)
(existing around 7 to 8 cm
of the rear scale)
Peak area
(existing around 6 to 7 cm
of the front scale)
(existing around 6 to 7 cm
of the front scale)
Error amount = approx. 14 cm
Example of decision:
The lens to be tested has a tendency of backward defocusing compared to the AE master lens. The error amount is approx. 14 cm.
Compare this error amount with the reference value and check whether the error amount is within the acceptable range.
If the error amount is outside the acceptable range, perform “4-12. FOCUSING ERROR AMOUNT ADJUSTMENT ( SB Writing)”.
The lens to be tested has a tendency of backward defocusing compared to the AE master lens. The error amount is approx. 14 cm.
Compare this error amount with the reference value and check whether the error amount is within the acceptable range.
If the error amount is outside the acceptable range, perform “4-12. FOCUSING ERROR AMOUNT ADJUSTMENT ( SB Writing)”.
'
Fig.
4-7-5
4-8. HALF COMPLETION ADJUSTMENTE/INSPECTION
Equipment
• Personal Computer
• Finished Inspection JIG II (AC 100 V only)
• Lens Adjustment Program (ACSSM-S-VerXXX.zip)
• Half Completion JIG
• Personal Computer
• Finished Inspection JIG II (AC 100 V only)
• Lens Adjustment Program (ACSSM-S-VerXXX.zip)
• Half Completion JIG
Note:
Please make the Half Completion JIG in each service station.
For details of the jig making method, refer to 4-1-1. List of Service Tools and Equipment Note 6.
4-8-1. Preparations
1) Assemble the checking lens to the half completion condition.
Encoder Flexible
Lens
MR Flexible
Motor Flexible
Fig.
4-8-1
2) Connected to equipment with checking lens. (Refer to 4-1-4. Connection of Finished Inspection JIG II/Half Completion JIG and
Startup of Lens Adjustment Program (ACSSM-S-VerXXX) )
3) Start up the lens adjustment program (ACSSM-S-VerXXX.exe).
4) Click [Set up], and perform the initial setting. (Refer to 4-1-5. Initial Setting of Lens Adjustment Program (ACSSM-S-VerXXX) )
4) Click [Set up], and perform the initial setting. (Refer to 4-1-5. Initial Setting of Lens Adjustment Program (ACSSM-S-VerXXX) )
4-14
SAL2470Z2 (Vario-Sonnar 2.8/24-70 ZA SSM II) (Vario-Sonnar T* 24-70mm F2.8 ZA SSM II)
4-8-2. Half Completion Adjustment/Inspection Item
Perform Half Completion Adjustment/Inspection items in the order as shown below.
1) Adjust Focus Brush
2) Focus-Adj Position
3) Focus Pattern (Motor)
4) MR Waves Check (Manual)
5) Adjust & Check MR
6) Adjust Driving Frequency & Gain
7) Focus Driving Trial Run
2) Focus-Adj Position
3) Focus Pattern (Motor)
4) MR Waves Check (Manual)
5) Adjust & Check MR
6) Adjust Driving Frequency & Gain
7) Focus Driving Trial Run
Fig.
4-8-2
4-8-3. MR Waveforms Inspection/Adjustment
1. Adjustment/Checking procedure
1) Click [Adjust/Check MR].
2) The frequency input window is displayed, input the number (upper three digits) written on the SSM flexible wire.
2) The frequency input window is displayed, input the number (upper three digits) written on the SSM flexible wire.
Example: In case the number written in the flexible wire is 180076
180076
Fig.
4-8-3
3) When no problem is found in [Adjust/Check MR], OK appears.
Fig.
4-8-4
4) If the [NG] button is displayed, perform the 2. Position adjustment of MR sensor .
2. Position adjustment of MR sensor
If [Adjust & Check MR] is not good, perform the following procedures for position adjustment of MR sensor.
1) Click [MR WavesCheck (Manual)] on the window and display the MR waveform screen.
2) Check waveform changes by operating the focus linkage ring.
1) Click [MR WavesCheck (Manual)] on the window and display the MR waveform screen.
2) Check waveform changes by operating the focus linkage ring.
Fig.
4-8-5
3) Confirm that the waveform is larger than the inner circle, and then click [OK].
Note:
The waveform is not necessarily displayed at the center of the window.
There is no problem when the waveform is larger than the inner circle even if the waveform is not positioned at the center of the window.
Click on the first or last page to see other SAL2470Z2 service manuals if exist.