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4-8

SAL24F20Z (Distagon 2/24 ZA T * SSM) (Distagon T * 24mm F2 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  4-9-3. 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 4-5-2, Fig. 4-5-1 and Fig. 4-5-2.

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 4-5-2 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.

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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 magnifi-
cation

AF Assist Chart (Size) 
Refer to Fig. 4-5-1.

Applicable Camera 
(image sensor type)

Applicable Lens

Calculation example of shooting 
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

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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)

4-9

SAL24F20Z (Distagon 2/24 ZA T * SSM) (Distagon T * 24mm F2 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. 4-5-3)

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

3)  Compare the error amount in step 2) with the reference value of Table 4-5-3 and check whether the error amount is within the accept-

able range. If the error amount is outside of the range, perform  4-9-3. Focusing Error Amount Adjustment (Write 

⊿

SB) .

0.48 m (20 times)

0 

±

 13

0.96 m (40 times)

0 

±

 53

1.44 m (60 times)

0 

±

 119

<For reference 1: shooting image by AE master lens> (Fig. 4-5-4)

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

 

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4-10

SAL24F20Z (Distagon 2/24 ZA T * SSM) (Distagon T * 24mm F2 ZA SSM)

<For reference 2: The example of focusing error amount value check> (Fig. 4-5-5)
Check the displacement between the focus position (peak of image-formation) of the lens to be tested and the focus position (peak of im-
age-formation) of the AE master lens.

Example of image shot with lens to be tested (50 mm F1.4)

Example of image shot with AE master lens

Peak area
(existing around 7 to 8 cm
of the rear scale)

Peak area
(existing around 6 to 7 cm
of the front scale)

Error amount = approx. 14 cm

Example of decision:
The lens to be tested has a tendency of backward defocusing compared to the AE master lens. The error amount is approx. 14 cm.
Compare this error amount with the reference value and check whether the error amount is within the acceptable range. 
If the error amount is outside the acceptable range, perform  4-9-3. Focusing Error Amount Adjustment (Write 

⊿

SB) .

Thickness gauge (Commercially available).
Adhesive Bond (B-10)

1. Preparation
1)  Set the lens to the state with the motor holding washer attached as shown in Fig. 4-6-1.
 

 

Mortar Holding Washer

2. Checking Method
1)  Measure the gap between the motor holding washer and the pressure plate with a thickness gauge. Check that the measured value is 

equal to the lower three digits of the value printed on the flexible board.

 

Example: When the value is  076

 

Ultrasonic motor height: 0.76 mm

 

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4-11

SAL24F20Z (Distagon 2/24 ZA T * SSM) (Distagon T * 24mm F2 ZA SSM)

1)  Measure the gap between the motor holding washer and the plate (pressure plate) with a thickness gauge, and write down the measured 

value.

2)  Adjust the ultrasonic motor height by turning the motor holding washer so that the gap between the motor holding washer and the plate 

(pressure plate) matches the value printed on the flexible board.

 

Mortar Holding Washer

Mortar Holding Washer

Plate (Pressure Plate)

Measure this gap.
(Use a thickness gauge.)

3)  After the adjustment has been completed, apply adhesive bond (B-10) to the specified locations of the motor holding washer.

 

Mortar Holding Washer

Apply the grease (B-10)

Personal Computer
Lens Adjustment Program (ACSSM-S-VerX.XX.zip)
Finished Inspection JIG II (AC 100 - 240 V)
Half Completion JIG

  Personal computer must have the condition that Windows Vista/7 runs normally and USB is connectable.

  Acquire the Lens Adjustment Program (ACSSM-S-VerX.XX.zip) from the each HQ.

  Please make the Half Completion JIG in each service station.

  For details of the jig making method, refer to Note 6 of  4-1-1. List of Service Tools and Equipment .

1.  Saving Lens Adjustment Program (ACSSM-S-VerX.XX.zip)
1)  Unzip the Lens Adjustment Program (ACSSM-S-VerX.XX.zip)
2) Save ACSSM-S-VerX.XX.exe  in an arbitrary folder.

The version of  ACSSM-S-VerX.XX.exe  might be updated.

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4-7-2. Connection of Finished Inspection JIGⅡ/Half Completion JIG and Startup of Lens Adjustment Pro-

 Confirm that 4-7-1. Installing the Lens Adjustment Program (ActuatorCheckerSSM)  has been completed before this procedure is executed.

  In case of performing Finished inspection, be sure to perform in the condition that the lens is laid down (do not perform in the lens standing con-

dition).

Personal Computer
Finished Inspection JIG II (AC 100 - 240 V)
Note:

  The cables and so on are not supplied as accessories.

Half Completion JIG
AC Cable (Sold on the Market)
RS232C Cable (D-Sub 9 Pins (Male with Securing Screws), D-Sub 9 Pins (Female with Securing Screws)) Straight Type (Sold on the 
Market)
USB to Serial Cable (D-Sub 9 Pins (Male)) (Sold on the Market)
M-BOX-JIG (J-6082-722-A) (Or the Jig supplied with Finished Inspection JIG (J-6082-645-A))
Lens Adjustment Program (ACSSM-S-VerX.XX.zip)

1. Connection
 

Connect equipment and checking lens as shown in Fig. 4-7-1 or 4-7-2.
Note: 

ActuatorCheckerSSM  cannot start up without the connection to the finished inspection JIG II.

Final

 

Finished Inspection JIG II

AC Cable

D-sub 9 Pins: Male

D-sub 9 Pins: Female

RS232C Cable

USB to Serial Cable

Lens

Half
1.  The Half completion JIG is installed on the Cab lens with two screws.
2.  Connect, Encoder flexible, MR flexible, and SSM flexible. (It is no need to connect SW flexible board.)

Finished Inspection JIG

MR Flexible
Board

SSM Flexible
Board

Encoder Flexible
Board

Half Completion JIG

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