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Model
SAL50F14Z
Pages
55
Size
11.7 MB
Type
PDF
Document
Service Manual
Brand
Device
Digital Camera
File
sal50f14z.pdf
Date

Sony SAL50F14Z Service Manual ▷ View online

4-2
SAL50F14Z (Planar 1,4/50 ZA) (Planar T*50mm F1.4 ZA SSM)
4-1-2. Check/Adjustment  Order
(Note) Effective lens of amount of
spherical aberration
The lens assembly is replaced following
(1) First of all, replace the 
1.
(2) If not improved, replace 
2.
2
 2nd Group Lens Block Assy
      (A-1969-097-A)
1
 1st Group Lens Block Assy
      (A-1943-051-A)
Optical System
4-2-1. Aperture 
Diameter Check
OK
OK
OK
OK
OK
OK
OK
NG
NG
NG
OK
NG
OK
OK
NG
NG
NG
NG
NG
NG
4-3-1. Optical
Axis Check
4-4-1. Projective
Resolving Power
Check
4-5-1. Flange Back (f'F)
Check
4-6. Focusing Error
Amount Check
4-2-2. Aperture
Diameter Adjustment
4-5-2. Flange Back (f'F)
Adjustment
4-3-2. Optical
Axis Adjustment
4-4-2. Projective Resolving Power
Adjustment (One Side Blur Adjustment)
Adjustment part:
2nd Group Lens Block Assy 
(Position adjustment)
4-10. FINISHED
ADJUSTMENT/
INSPECTION
4-10-3. MR Inspection
Replace the spherical
aberration correcting lens
(Note)
4-8. ULTRASONIC
MOTOR HEIGHT 
CHECK
Drive System &
Finished Inspection
4-7. FOCUS
BRUSH POSITION
CHECK
4-10-4. Focusing Error
Amount Adjustment
(Write 
⊿SB)
END
4-7. FOCUS
BRUSH POSITION
ADJUSTMENT
4-8. ULTRASONIC
MOTOR HEIGHT 
ADJUSTMENT
4-10-3. MR Adjustment
4-3
SAL50F14Z (Planar 1,4/50 ZA) (Planar T*50mm F1.4 ZA SSM)
4-2.  APERTURE DIAMETER CHECK/ADJUSTMENT
4-2-1. Aperture Diameter Check
Equipment
• Luminance Box
•  Camera (One of DSLR-A700, SLT-A37/A57/A58/A65/A77/A99)
•  AE Master Lens
• Memory Card
•  Personal Computer (Color Calculator 2 installed)
1. Preparations
Note:
  Confirm the checking lens by complete.
1)  Install the memory card to the camera.
2)  Set the equipment, camera and AE master lens as shown in Fig. 4-2-1.
Luminance box
 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
Master lens or checking lens
Focus: Infinity end
Shoot the center of the luminance surface
 Fig. 
4-2-1
3)  Shoot the images under the following conditions and save them.
Note: 
Shoot the center of the luminance surface three times with the AE master lens and checking lens.
Setting of Luminance box:
Luminance:
EV12
Setting of Lens:
Focus:
Infinity end
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
2.  Checking of Image
Note: 
Check the image of both AE master lens and checking lens.
1)  Start the Color Calculator 2.
 
 Fig. 
4-2-2
2)  Read the image from the file menu.
Fig. 4-2-3
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. 
4-2-4
 
Color space (Edit menu): sRGB
 
 Fig. 
4-2-5
 
Area size for calculate (Edit menu 
Option): 256
×
256 Pixels
 
 Fig. 
4-2-6
4-4
SAL50F14Z (Planar 1,4/50 ZA) (Planar T*50mm F1.4 ZA SSM)
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)
 
Calculate button
Check the “G” value
 Fig. 
4-2-7
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 = -20 to +5
2)  When the aperture error is out of specification, perform  4-2-2. Aperture Diameter Adjustment .
4-2-2. Aperture  Diameter  Adjustment
Equipment
• Universal Wrench
•  Chip-A for Universal Wrench
•  Adhesive bond (B-10)
Adjustment Procedure
1)  Disassemble or assemble the lens as shown in Fig. 4-2-8.
 
1st Group Lens Block Assy
Front Ring
 Fig. 
4-2-8
2)  Remove the adhesive bond and loosen the screws fixing the aperture cam plate.
 
Remove the adhesive bond
Remove the adhesive bond
Remove the
adhesive bond
Remove the
adhesive bond
 Fig. 
4-2-9
3)  Set the Aperture Preset Ring at the aperture open position by moving the preset lever, and fix the Aperture Preset Ring.
 
Preset lever
Aperture open position
 Fig. 
4-2-10
4)  Move the Aperture Blade Unit of aperture in the position where the Aperture Blade Unit of aperture is completely hidden by the inside 
diameter of the aperture cam plate and tighten the screws of the aperture cam plate.
 
Aperture Blade Unit
Aperture cam plate
 Fig. 
4-2-11
4-5
SAL50F14Z (Planar 1,4/50 ZA) (Planar T*50mm F1.4 ZA SSM)
5)  Apply adhesive bond (B-10) to the screws shown in Fig. 4-2-12.
 
Apply adhesive 
bond (B-10)
Apply adhesive 
bond (B-10)
Apply adhesive 
bond (B-10)
Apply adhesive 
bond (B-10)
 Fig. 
4-2-12
6)  Assemble the lens completely.
7) Perform the 4-2-1. Aperture Diameter Check  and repeat steps 1) to 4) until the aperture tolerance meets the specification.
4-3. OPTICAL AXIS CHECK/ADJUSTMENT
Setting of the Flange Back (f F) measuring instrument.
Equipment
•  1000 mm Collimator
•  Flange Back Tester
• A-mount Attachment
•  Flange Back Gauge (43.50 mm)
1. Preparations
1)  Set the equipment as shown in the Fig. 4-3-1.
 
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. 
4-3-1
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.
Note: 
Turn the knob in the direction of the arrow of Fig. 4-3-2 for correct reading.
 
Focusing knob
Focus on fine lines on the surface.
Always turn the knob in the arrow
direction for correct reading.
 Fig. 
4-3-2
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.
4-3-1. Optical  Axis  Check
1)  Attach the checking lens to the flange back tester, and set the 1000 mm collimator.
 
1000 mm collimator
Checking lens
 Fig. 
4-3-3
2)  Set the focus ring of the checking lens to 
 (infinity) index or near 
 (infinity)  and adjust the optical axis, observing the microscope 
so that the chart can be seen in the center.
3)  Turn the focusing knob of the flange back tester until the chart image comes into focus.
 
Also check the optical axis aligns with the chart center. (Refer to Fig. 4-3-4.)
Note: 
Figure shows example. The cause depends on individual lens.
 
Optical Alignment
Best alignment
Incorrect aligned
e.g. As the focusing knob is turned, the chart may appear blurry as illustrated.
The cause depends on individual lens.
 Fig. 
4-3-4
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