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1-4

SAL50M28 (MACRO 2.8/50) (50mm F2.8 Macro)

Check the operation

again.

Replace the defective part

or apply the grease.

OK

NG

OK

OK

OK

OK

Function NG

Position NG

Focus trouble

Replace the defective part

or apply the grease.

Check the coupler and

gear block.

Check the fixed holding

tube block and

fixed barrel unit.

NG

NG

NG

NG

NG

END

OK

Check the position

and deformation 

at the tip of the

A encoder brush.

Adjust the position, or replace

the A encoder brush.

Check pattern

of the main flexible block.

Clean the pattern of the 

 main flexible block.

Replace the

main flexible block.

2-1

SAL50M28 (MACRO 2.8/50) (50mm F2.8 Macro)

Cut and remove the part of gilt 
which comes off at the point.
(Be careful or some 
pieces of gilt may be left inside) 

• Make sure that the flat cable and flexible board are not cracked of bent at the terminal.

Do not insert the cable insufficiently nor crookedly.

• When remove a connector, dont’ pull at wire of connector. It is possible that a wire is snapped.

• When installing a connector, dont’ press down at wire of connector.

It is possible that a wire is snapped.

• Do not apply excessive load to the gilded flexible board.

In case of the following notches or holes are located in the lens block, etc during disassembling/
assembling the lens, Use the universal wrench.

Attach the chip-A or chip-B to the universal wrench.
For the notches: chip-A
For the holes:

chip-B

Match the universal wrench to the holes or notches of the lens block, etc.

When top of tip does not reach holes or notches because the fixed screw becomes obstructive,
replace the fixed screw to below.
+B 3X5 7-682-546-09

Notches

Holes

Universal wrench
J-6082-609-A

Chip-A for 
universal wrench:
J-6082-609-1

Chip-B for 
universal wrench:
J-6082-609-2

Notches

Chip-A

Chip-A

Chip-B

Chip-B

Chip

Fixed screw

Fixed screw

Chip

Match the universal wrench 
to the width of holes or notches.

Universal wrench

Holes

2-2

SAL50M28 (MACRO 2.8/50) (50mm F2.8 Macro)

(See Page 2-3.) 

3

 Main Flexible Block

6

 Back Adjustment

     Washer

4

 Rear Light 

7

 Coupler

5

 Mount

     Riveting
     Block

1

 Front Light 

2

 Front Lens

     Barrel

Note: 
Attach the decollation ring after cleaning the 
attaching surface of the middle barrel.

Shield Barrel

Shield Barrel

Note: 
Remove the front light shield barrel
using the name ring wrench A (49mm).

Name ring wrench A (49mm):
J-6082-586-A

Name ring wrench A (49mm)

2-3

SAL50M28 (MACRO 2.8/50) (50mm F2.8 Macro)

1

 SW Flexible and  Main Flexible Block

2

 Focus Rubber Ring

3

 MF Operation Ring

4

 Torque Ring Block

!-

 Torque Ring

!=

 

 Torque Ring

8

 Spring Lever

5

 Anti Slip Spring

6

 Fixed Holding

     Tube Block

7

 

Focus 

Operation

Ring Guide Nut

Block

9

 Pinch Distance

Adjust
Washer-A

0

 Float Ring

Holder

Spring Adjust

![

 Friction

      Spring

Select the friction spring and torque ring spring adjust
according to the rotation load of the torque ring as follows.

1. Use the friction spring B and torque ring spring adjust washer (1 piece) as reference.
2. Adjust the torque of the torque ring by changing the number of the 

3. If the rotation remains light even adjust the torque by torque ring spring adjust washer, 

Friction spring A (T = 2.05 mm): 2-684-266-01
Friction spring B

 (T = 1.32 mm): 2-684-267-01

Replace the friction spring B to the friction spring A and adjust again.

torque ring spring adjust washer (0 to 6 pieces).

(See Page 2-4.) 

(See Page 2-5.) 

Note: