Sony SAL35F14G Service Manual page 59

4-6. 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: • Shooting magnification (60, 40, 20 times)
• Chart for checking the depth area of image-formation (tilting chart 2 types)
• Defocus value "0 ± 10 µm"
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 "4-7-4. 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
DSLR-A700 Defocus checker
Defocus Checker 2
• 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
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 4-6-2, Fig. 4-6-1 and Fig. 4-6-2.
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 4-6-2 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.
SAL35F14G (1.4/35G) (35mm F1.4G)
Camera
DSLR-A700
SLT-A37/A57/A58/A65/A77/A99
Table 4-6-1
4-20
SB".