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4-7

SAL50F14Z (Planar 1,4/50 ZA) (Planar T*50mm F1.4 ZA SSM)

2)  Attach the checking lens to the lens test projector, and set the equipment as shown in Fig. 4-4-2.
3)  Turn the fan switch of the lens test projector to ON, then turn the lamp switch to ON.  

 

Distance

Lens test projector

Chart

Fan switch

Lamp switch

Plane mirror

Screen

A-mount attachment

Checking lens

F

L

4)  Turn the focus ring of the checking lens until the chart image projected on the screen is the sharpest at the center (y  = 0).
5)  Set the plane mirror to the center of the projected image (y  = 0), and adjust the projector position so that the mirror reflects the light to 

the center of the lens.

2.  Projective Resolving Power Checking Method
1)  Turn the focus ring of the checking lens until the chart image projected on the screen is the sharpest at the center (y  = 0).
2)  Read the number of the smallest pitched lines at the center (y  = 0).

 

The number represents for lines per mm.

Sagittal (S)

Meridional (M)

3)  Rotate the mount rotational plate of the lens projector while observing y  = 9, y  = 12, y  = 15 or y  = 18 and stop it at the location where 

the projective resolving power is worst (low).

 

Read the number of the smallest pitched lines (both sagittal and meridional: 3 lines) at the peripheral point.
Note: 

When reading the number of the smallest pitched lines, be careful of the spurious resolution.

Spurious resolution is the reversed image of 2 or 4 lines which appears on screen when focus is beyond maximum revolving power as shown in 
Fig. 4-4-4.

 

 

Do not confuse spurious resolution for the smallest pitched lines.

 

Correct resolution

Spurious resolution

4)  Change the focal length and projected length of the checking lens. (In case of the zoom lens), project the S image and the M image at 

each focal point/projected length and confirm that the number of resolution satisfies the specification of the Table 4-4-1.

Focal length

f (mm)

Distance 

(m)

Number of the smallest pitched lines (lines/mm)

Center (y  = 0)

Peripheral (y  = 15)

Peripheral (y  = 18)

S

M

S

M

50

2.0 

125 lines or greater 40 lines or greater

50 lines or greater

50 lines or greater

40 lines or greater

5)  Check the projective resolving power. If the projective resolving power does not satisfy the specification, perform  4-4-2. Projective Re-

solving Power Adjustment (One Side Blur Adjustment) .

 Check the projective resolving power. If it does not satisfy the specification, perform projective resolving power (one side blur) adjustment.

1. Adjustment method
1)  Remove the adhesive bond and loosen the screws fixing the 2nd Group Lens Block Assy.

 

CL-048 Board

2nd Group Lens Block Assy

2nd Group Lens
Block Assy

Remove the 
adhesive bond

Remove the adhesive bond

Remove the 
adhesive bond

Remove the 
adhesive bond

2)  Remove the three screws and turn the 2nd Group Lens Block Assy with 1/3 turn to shift position, and install it.

 

2nd Group Lens Block Assy

4-8

SAL50F14Z (Planar 1,4/50 ZA) (Planar T*50mm F1.4 ZA SSM)

3)  Temporarily assemble lens for the Mount Riveting Block Assy, and perform  4-4-1. Projective Resolving Power Check  again.
 

If it does not satisfy the specification, change attaching position of the 2nd Group Lens Block Assy by repeating items 1) to 3). Check it 
again. If it does not improve the value, replace the 2 group lens block assy.

4)  After the adjustment, apply adhesive bond (B-10) to the screws as shown in Fig. 4-4-7.

 

Apply adhesive 
bond (B-10)

Apply adhesive 
bond (B-10)

Apply adhesive 
bond (B-10)

Apply adhesive 
bond (B-10)

2nd Group Lens Block Assy

1. Preparation
1)  Switch the panel switch on the lens to  MF .

2. Checking method
1)  Set the focus to over infinity end, perform  4-3. OPTICAL AXIS CHECK/ADJUSTMENT , Make sure that it satisfies the specifica-

tion.

Focal length f (mm)

Flange back value f F (mm)

50

44.71 

±

 0.05 (44.66 to 44.76)

2)  The flange back value of the lens is not satisfied the specification as shown in table 4-5-1, perform  4-5-2. Flange Back (f F) Adjust-

ment .

 

1. Adjustment Method
1)  Calculate the shift value from  4-5-1. Flange Back (f F) Check  result, and increase or decrease Back Adjustment Washers.

WB = f F (measurement value) - 44.71 mm

2)  Remove the Back Adjustment Washers, measure the thickness by using micrometer or vernier caliper and select the Back Adjustment 

Washers of appropriate thickness.
•   In case the value of WB is positive (+) : Increase thickness of the Back Adjustment Washer.
•   In case the value of WB is negative (-) : Decrease thickness of the Back Adjustment Washer.

 

Rear Cover Barrel

Connection Box

Mount Riveting Block Assy

Back Adjustment Washer

Part Number

Thickness (mm)

2-684-123-01

0.05

2-684-124-01

0.07

2-684-125-01

0.1

2-684-126-01

0.2

2-684-127-01

0.5

3) Perform 4-5-1. Flange Back (f F) Check .

4-9

SAL50F14Z (Planar 1,4/50 ZA) (Planar T*50mm F1.4 ZA SSM)

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 

μ

m

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  4-10-4. Focusing Error Amount Adjustment (Write 

⊿

SB) .

•  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

 

•  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.

Shooting distance is obtained by shooting magnification and focal length as following.

 

[Shooting distance] = [shooting magnification] 

×

 [focal length]

Select the combination according to the Table 4-6-2 Guidelines table.

  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:

  If an abnormal phenomenon appears during installation of the teleconverter used by the user, install the user s teleconverter.

 

Selection of 
Shooting magni-
fication

AF Assist Chart (Size) 
Refer to Fig. 4-6-1.

Applicable Cam-
era (image sensor 
type)

Applicable Lens

Calculation example of shoot-
ing distance 
[shooting magnification] 

×

 

[focal length] = [shooting dis-
tance]

60 times 
(middle distance)

AF Assist Chart 60 Times 
(200 mm 

×

 100 mm)

APS-C size type 

All

60 times 

×

 50 mm = 3000 mm

40 times 
(middle distance)

AF Assist Chart 40 Times 
(132 mm 

×

 66 mm)

35 mm full size type

All

40 times 

×

 50 mm = 2000 mm

20 times 
(short distance)

AF Assist Chart 20 Times 
(66 mm 

×

 33 mm)

both size available

•  Macro lens
•  Lens with a focal 

length of more 
than 300 mm

20 times 

×

 300 mm = 6000 mm

 

(100 mm)

(66 mm)

(33 mm)

(200 mm)

(132 mm)

(66 mm)

AF Assist Chart
60 Times

AF Assist Chart
40 Times

AF Assist Chart
20 Times

 

Camera Setting

Exposure mode
Focus Mode
Focus Area

Image Size
Super SteadyShot
Drive Mode

: A (Open Aperture)
: 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.

AF Assist Chart
(60 Times/40 Times)

Chart for checking the depth area of image-formation
(60 Times/40 Times)

4-10

SAL50F14Z (Planar 1,4/50 ZA) (Planar T*50mm F1.4 ZA SSM)

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 

μ

m  in the manual focus mode.

 

The tolerance is  0 

±

 10 

μ

m . (Fig. 4-6-3)

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.

Shoot images with the AE master lens and the lens to be tested using the same camera.

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.

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.

 

 

 

 

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.)

 

 

 

 

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.

 

Defocus Checker 2
(For SLT-A37/A57/A58/A65/A77/A99)

DSLR-A700 Defocus checker
(For DSLR-A700)

In case Good (0 

± less than 10 μm), frame 

of waveform area displays in green.

In case Good (0 

± less than 10 μm), frame 

of waveform area and defocus value display 
in green.

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 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. 4-6-4 and Fig. 4-6-5.)

3)  Compare the error amount in step 2) with the reference value of Table 4-6-3 and check whether the error amount is within the accept-

able range. If the error amount is outside of the range, perform  4-10-4. Focusing Error Amount Adjustment (Write 

⊿

SB) .

Focal length/

50 mm

Distance

(mm)

1.0 m (20 times)

0 

±

 9

2.0 m (40 times)

0 

±

 37

3.0 m (60 times)

0 

±

 83

<For reference 1: shooting image by AE master lens> (Fig. 4-6-4)
•  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 

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.

Enlargement of same pixel magnification

Example of image shot with 
a certain AE master lens under 
a certain environment.

Identifying the peak position of 
image-formation:
• Center of sharpest area
• Center of area with less color fogged
    - Front defocus area: Magenta fogged
    - Rear defocus area: Green fogged

Example where peak position accidentally matches 
the AF Assist Chart position