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4-2. OPTICAL AXIS CHECK
4-2-1. Setting of the Flange Back (f'F) Measuring Instrument
Service Tools and Equipments (Common)
• 1000 mm Collimator (See Note)
• Flange Back Tester
• A-mount Attachment
• A-E mount Conversion Attachment
• Flange Back Gauge (43.50 mm)
• Extension Jig (47.00 mm)
• FB tester stand
• Camera table 200X200
Note: Attach the chart to the 1000 mm collimator as shown in the figure below.
Align the
marks
Chart
1000 mm collimator
Setting of the Flange Back Tester
1. Set the equipment as shown in the figure below.
Dial Gauge
A-mount attachment
(Min. scale: 0.01 mm)
Objective lens (10x)
Eyepiece lens (7x)
Eyepiece ring
Scale ring
FB Tester Stand
Camera Table
200×200
Flange back gauge (43.50 mm)
SELP1650 (E 3.5-5.6/PZ 16-50 OSS) (E PZ 16-50mm F3.5-5.6 OSS)
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. While applying light to the flange back gauge, turn the focusing knob of the flange back tester so that fine scratches are the sharpest.
Note: Turn the knob in the direction of the arrow of figure below for correct reading.
Always turn the knob
in the arrow direction
for correct reading.
Focusing knob
Focus on fine lines
on the surface.
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 the short pointer.
Preparations of Using a Camera (General E-mount Interchangeable Lens Digital Camera)
Equipment and Tools
• E-Mount Extension Jig
• Camera (General E-mount Interchangeable Lens Digital Camera)
Setting of Equipments
1. Attach the A-E mount conversion attachment and E-mount extension jig to the A-mount attachment and install them to the flange back tester as
shown below.
Note: Configure the setting of a camera as follows.
• Focus Mode: Manual Focus
• Shake Compensation: OFF
• Aperture: Open
2. Attach the extension jig (47.00 mm) to the objective lens (10x) to install it to the flange back tester.
3. Attach the checking lens to the flange back tester, and set the 1000 mm collimator.
Checking lens
Extension Jig (47.00 mm)
1000 mm collimator
FB Tester Stand
A-E mount conversion
attachment
Camera Table
200×200
E-Mount Extension Jig
Camera
(General E-mount
interchangeable lens
digital camera)
4-3
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