Sony SAL50F14 Service Manual ▷ View online
4-3
SAL50F14 (1.4/50) (50mm F1.4)
4-1-2. Lens Adjustment Program
The lens adjustment program is required for the following check/adjustment.
4-5. LENS ROM CHECK
4-6. FOCUS BRUSH POSITION CHECK/ADJUSTMENT AND PATTERN CHECK
Prepare/start the Lens adjustment program with the following steps.
Equipment
• Personal Computer (PC)
• Camera DSLR-A100
• USB Cord With Connector
• Lens Adjustment Program
Note:
Lens Adjustment Program is downloadable from the ESI homepage.
1. Installation of the Lens Adjustment Program
For installation of the lens adjustment program, refer to the link “• Preparing the DSLR-A100 adjustment program” described on the
top cover of the camera DSLR-A100 service manual “9-852-130-5 ”.
Note:
Store the lens adjustment program “LensAdjustment.exe” and related file “AlphaLensAdjust.txt” in the folder that contains
the DSLR-A100 adjustment program “DSLRadj_cs.exe”.
2. Start the Lens Adjustment Program
1)
Connect the camera and PC with the USB cord with connector.
2)
Set the mode dial of camera to “M”.
3)
Turn the POWER switch of the camera to OFF, then turn the POWER switch to ON while pressing the shutter button halfway down
with pressed the
button of controller keys and MENU buttons.
4)
Check that the remaining number of recordable images on the LCD monitor is “BBBB”.
Note:
When “BBBB” is displayed, the camera activates in the adjustment mode.
5)
Start the lens adjustment program “LensAdjustment.exe”.
4-4
SAL50F14 (1.4/50) (50mm F1.4)
4-2.
APERTURE DIAMETER CHECK/ADJUSTMENT
4-2-1. Aperture Diameter Check
Note:
Perform the aperture diameter check in the state of the Fig.4-2-1 (only the decoration ring was removed), or completion of
assembling. When remove the decoration ring, use the name ring wrench (55mm).
Fig.4-2-1
Equipment
• Luminance Box
• Camera DSLR-A100
• AE Master Lens
• Compact Flash (CF) Card (For image saving)
• Personal Computer (PC)
(Color Calculator 2 installed)
1. Preparations
Note:
Confirm the checking lens by complete. (The adjustment of focus brush is completed.)
1)
Install the CF card to the camera.
2)
Set the equipments, camera and master lens as shown in Fig.4-2-2.
Fig.4-2-2
3)
Shoot the images under the following conditions and save them.
Note:
Shoot the center of the luminance surface three times with the master lens and checking lens.
Setting of Luminance box:
Luminance:
EV12
Setting of Lens:
Focus:
Infinity end
Luminance box
Luminance: EV12
Luminance: EV12
Camera
ISO: 100
Exposure Mode: M
Shutter Speed: 1/125
Aperture: F5.6
Focus Mode: MF
Metering: Center weighted
Preset white balance: Tungsten
D-R: OFF
ISO: 100
Exposure Mode: M
Shutter Speed: 1/125
Aperture: F5.6
Focus Mode: MF
Metering: Center weighted
Preset white balance: Tungsten
D-R: OFF
Master lens or checking lens
Focus: Infinity end
Focus: Infinity end
Shoot the center of the luminance surface
Setting of Camera:
ISO:
100
Exposure Mode:
M
shutter Speed:
1/125
Aperture:
F5.6
Focus Mode:
MF
Metering:
Center weighted
Preset white balance: Tungsten
D-R:
OFF
Decoration Ring
Ver. 1.2 2008.01
The changed portions from
Ver. 1.1 are shown in blue.
Ver. 1.1 are shown in blue.
4-5
SAL50F14 (1.4/50) (50mm F1.4)
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2. Checking of Image
Note:
Check the image of both master lens and checking lens.
1)
Start the Color Calculator 2.
Fig.4-2-3
2)
Read the image from the file menu.
Fig.4-2-4
3)
Set the Color Calculator 2 as follows.
Measured value display (Display menu): RGB+L*a*b*
Measuring method (Display menu):
Center Single Area
Fig.4-2-5
Color space (Edit menu): sRGB
Fig.4-2-6
Area size for calculate (Edit menu
→Option): 256×256 Pixels
Fig.4-2-7
4-6
SAL50F14 (1.4/50) (50mm F1.4)
4)
Click the calculate button to measure the image.
5)
After measuring, check the “G” values.
Average “G” value of the three images shoot with master lens:
(a)
Average “G” value of the three images shoot with checking lens: (b)
Fig.4-2-8
3. Checking Method
1)
Calculate aperture error using the following formula, and check that the aperture error is within the specification.
Aperture error = Average “G” value of checking lens (b) - Average “G” value of master lens (a)
Specification
Aperture error = 0
±12
2)
When the aperture error is out of specification, perform “4-2-2. Aperture Diameter Adjustment”.
Calculate button
Check the “G” value
Ver. 1.2 2008.01
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 SAL50F14 service manuals if exist.