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5-7

SAL70200G2 (2.8/70-200 G SSM Ⅱ) (70-200mm F2.8 G SSM II)

2)  If the result in step 1) does not meet the specification, push the 5 group ball frame block to reduce the gap or play.

a.  Disassemble up to outer barrel.
b.  Push the 5 group ball frame tube block in the opposite direction where the CB occurs.

 

5 Group Ball Frame Block

3)  If the result does not meet the specification in steps 1) and 2), push the 1 group ball frame tube block to reduce the gap or play again.
4)  When the optical adjustment is completed, make the marking-off on the bore of mirror tube block and outer diameter of 1 group ball 

frame tube block (G3 riveting tube block).
Note:

  When making the marking-off, remove the G1 lens and the G2 lens.

 

Mirror Tube Block

G3 Riveting Tube Block

G1

G2

1 Group Ball Frame Tube Block

G1 Holder Ring

Make the marking-off on the outer diameter

Setting of Lens Test Projector.

Equipment
•  Lens Test Projector and Variable Transformer (Output voltage: AC 100 V)

Connect the variable transformer (Output voltage: AC 100 V) to the lens test projector.

• A-mount Attachment
•  Screen (Art paper)
• Tape Measure
•  Plane Mirror (For SLRs)

1. Preparations
1)  Perform the following steps (1) to (3), and incorporate the internal lenses of the lens test projector according to the checking focal 

length.
(1)  Open the lid of the lens test projector.
(2)  Pull up and turn the fixed levers on the right and left sides of the lens test projector.
(3)  Remove or insert the lens.

Be sure to have the right position and direction of the lens.  

 

Lens test projector

Incorporate of the lenses
according to the checking focal-length (f).

Lens

Fixed lever

Fixed lever

Lid

f=18 to 35 mm

f=35 to 100 mm

f=100 to 200 mm

f=200 to 300 mm

Heat-absorbing filter 

Chart

Chart

Chart

Chart

Filament

Filament

Filament

Filament

2)  Attach the checking lens to the lens test projector, and set the equipment as shown in Fig. 5-4-2.
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.

5-8

SAL70200G2 (2.8/70-200 G SSM Ⅱ) (70-200mm F2.8 G SSM II)

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. 5-4-4.

 

 

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 5-4-1.

70

3.16

125 lines or 

greater

63 lines or 

greater

50 lines or 

greater

50 lines or 

greater

40 lines or 

greater

135

5.7

125 lines or 

greater

63 lines or 

greater

32 lines or 

greater

50 lines or 

greater

32 lines or 

greater

200

8.09

125 lines or 

greater

63 lines or 

greater

40 lines or 

greater

50 lines or 

greater

40 lines or 

greater

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

solving Power Adjustment (One Side Blur Adjustment) .

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

1. Adjustment procedure
1)  Rotate the 1 group ball frame tube block and perform the  5-4-1.Projective Resolving Power Check . 
 

In case of OK, the adjustment is finished.

 

If NG, perform the adjustment below.

2)  Push the 5 group ball frame block in the direction of poor projection to reduce the gap.
3)  Confirm the optical axis. (Refer to section 5-3-1.)
 

In case of OK, check the projective resolving power.

 

If NG, perform the adjustment below.

4)  Push the 1 group ball frame tube block in the direction of center shift occurrence.
 

In case of OK, check the projective resolving power.

  When measuring or adjusting the flange back (f F), touch the focus and the zoom as shown below.

Zoom

200

Be sure to rotate from  135  to the WIDE side and touch slowly.

70

Be sure to rotate from  100  to the TELE side and touch slowly.

Focus

Over infinity 
end

Rotate from 3 m to the near end and touch slowly to the over infinity stopper. (Do not 
slip it.)

1)  Set the focal length to the WIDE end (70 mm).
2)  Set the focus to the over infinity end.
3)  Confirm the flange back (f F) value at the WIDE end (70 mm).
4)  Set the focal length to the TELE end (200 mm) and confirm the flange back (f F) value.

Flange back (f F) value =
 

(Value of flange back gauge for SR) + (Number of rotation of short pointer) + (Scale of long pointer)

200

46.59 

±

 0.07 (46.52 to 46.66)

-1.99

70

44.87 

±

 0.07 (44.80 to 44.94)

5)  Rotate the knob of microscope and set the dial gauge to the value below.

Flange back (f F) value at the TELE end (200 mm) and over infinity end - 1.99 (mm)

6)  Rotate the mirror tube block so that it is in focus.
 

Confirm that the L index is in the range shown below.

 

7)  If it does not meet the specification in the steps up to 6), after implementing the  5-5-2. Focus-Shift (Focal Length) Check/Adjustment , 

perform the  5-5-3. Flange back (f F) Adjustment .

5-9

SAL70200G2 (2.8/70-200 G SSM Ⅱ) (70-200mm F2.8 G SSM II)

In this section, the procedure to adjust the focus change occurred when changing the focal length is described.

1. Preparation
Perform  1. Preparations  in the  5-3. OPTICAL AXIS CHECK/ADJUSTMENT .

2. Checking procedure
1)  Set the focal length to the TELE end (200 mm).
2)  Set the focus to the over infinity end.
3)  Confirm the flange back (f F) value at the TELE end.
4)  Shift the focal length from the TELE end to the WIDE end and from the WIDE end to the TELE end, and then confirm the flange back 

(f F) value of each focal length.

5)  Confirm that the focus-shift meets the specification with the flange back (f F) value obtained in step 3). If the focus-shift does not meet 

the specification, adjust it.

70 to less than 135

-0.1 to +0.1

135 to 200

-0.15 to +0.1

3. Adjustment procedure
1)  Set the focal length to the TELE end (200 mm).
2)  Set the focus to the over infinity end.
3)  Confirm the flange back (f F) value at the TELE end.
4)  Set the focal length to the WIDE end (70 mm) and confirm the flange back (f F) value.
5)  Calculate the results obtained in steps 3) and 4) using the formula below and determine the amount of focus point movement adjustment 

washer.

Amount of focus point movement adjustment washer = {(46.59 - TELE end f F) - (44.87 - WIDE end f F)}/ - 0.86

6)  Increment or decrement the washer according to the amount of Focus Point Movement Adjustment Washer.
 

When the amount of focus point movement adjustment washer is positive value (+):

 

 

Make the focus point movement adjustment washer thicker.

 

When the amount of focus point movement adjustment washer is negative value (-):

 

 

Make the focus point movement adjustment washer thinner.

2-691-553-01

Focus point movement adjustment washer A

0.05

2-691-554-01

Focus point movement adjustment washer B

0.07

2-691-555-01

Focus point movement adjustment washer C

0.1

2-691-556-01

Focus point movement adjustment washer D

0.2

2-691-557-01

Focus point movement adjustment washer E

0.5

7)  Set the lens unit as shown in the Fig. 5-5-2 and assemble the focus point movement adjustment washer.

 

Focus Point Movement Adjustment Washer

  Perform the flange back (f F) adjustment after competing the  5-5-2. Focus-Shift (Focal Length) Check/Adjustment .

1. Preparation
Perform  1. Preparations  in the  5-3. OPTICAL AXIS CHECK/ADJUSTMENT .

2. Adjustment procedure
1)  Set the focal length to the WIDE end (70 mm).
2)  Set the focus to the over infinity end.
3)  Confirm the flange back value (f F) at the WIDE end.
4)  Calculate the results obtained in step 3) using the formula below and seek the flange back correction value.

Flange back correction value (mm) = Flange back value (f F) at the WIDE end and over infinity end - 44.87 mm

5)  Increment or decrement the washer according to the flange back correction value.
 

When the flange back correction value is positive (+): Make the back adjustment washer thicker.

 

When the flange back correction value is negative (-): Make the back adjustment washer thinner.

2-691-806-01

Back adjustment washer A

0.05

2-691-807-01

Back adjustment washer B

0.07

2-691-808-01

Back adjustment washer C

0.10

2-691-809-01

Back adjustment washer D

0.20

2-691-810-01

Back adjustment washer E

0.50

6)  Assemble the back adjustment washer and perform the  5-5-1. Flange Back (f F) Check  again and confirm that it meets the specifica-

tion.

 

Lean the outer tube block and 
insert the back adjustment washer 
as shown in figure.

Back Adjustment Washer

Loosen the four screws

Outer Tube Block

Connect Barrel Unit

5-10

SAL70200G2 (2.8/70-200 G SSM Ⅱ) (70-200mm F2.8 G SSM II)

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  5-10-2. 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 5-6-2, Fig. 5-6-1 and Fig. 5-6-2.

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 5-6-2 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. 5-6-1.

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)