5-5
SEL1635GM
5-2. OPTICAL AXIS CHECK/
ADJUSTMENT
5-2-1. Setting/Preparation of the Flange Back (f’F)
Measuring Instrument
Equipment and Tools (Common)
• 1000 mm Collimator (See Note)
• Flange Back Tester
• FB Tester Stand
• Camera Table 200
200
• A-mount Attachment
• A-E mount conversion attachment
• Flange Back Gauge (43.50 mm)
• Extension Jig (47.00 mm)
Note:
Attach the chart to the 1000 mm collimator as shown in the
following
fi
gure.
Align the marks
1000 mm collimator
Chart
Setting of the Flange Back Tester
1. Set the equipment as shown in the following figure.
Flange back gauge (43.50 mm)
A-mount attachment
Objective lens (10x)
Dial Gauge
(Min. scale: 0.01 mm)
Camera Table
200×200
FB Tester Stand
Scale ring
Eyepiece lens (7x)
Eyepiece ring
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 focus-
ing knob of the flange back tester so that fine scratches are the
sharpest.
Note 1:
Turn the knob in the direction of the arrow of following
fi
gure for correct reading.
Focusing knob
Focus on fine lines
on the surface.
Always turn the knob
in the arrow direction
for correct reading.
5. Turn the scale ring of the dial gauge until the long pointer indi-
cates “0”.
Note 2:
This position is the
fl
ange back (f’F) = 43.50 mm.
Memorize the position of the short pointer.
