Read Sony SAL24F20Z Service Manual online
4-8
SAL24F20Z (Distagon 2/24 ZA T * SSM) (Distagon T * 24mm F2 ZA SSM)
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 4-9-3. Focusing Error Amount Adjustment (Write
⊿
SB) .
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.
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.
Acquire the Chart_for_checking_image_formation_20x_(E).zip from the each HQ.
Software
Acquire the following either software from the each HQ.
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
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)
Memory Card
Tripod
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)
Memory Card
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.
•
•
•
•
•
•
•
•
•
•
•
•
•
•
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 magnifi-
cation
Shooting magnifi-
cation
AF Assist Chart (Size)
Refer to Fig. 4-5-1.
Refer to Fig. 4-5-1.
Applicable Camera
(image sensor type)
(image sensor type)
Applicable Lens
Calculation example of shooting
distance
[shooting magnification]
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
length of more than
300 mm
Lens with a focal
length of more than
300 mm
•
•
•
20 times
×
300 mm = 6000 mm
Table
4-5-2
(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.
4-5-1
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.
4-5-2
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