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4-14
SAL50F14 (1.4/50) (50mm F1.4)
4-4-2. Flange Back (f’F) Adjustment
Equipment
• 1000 mm Collimator
• Flange Back Tester
• A-mount Attachment
• Flange Back Gauge (43.50mm)
• Adhesive bond (B-10)
• Name Ring Wrench (55mm)
Adjusting Method
1)
Disassemble or assemble the checking lens into the state of Fig.4-4-5.
Fig.4-4-5
2)
Perform “4-4-1. Flange Back (f’F) Check”, and check that the flange Back (f’F) of the checking lens is out of specification of the
Table 4-4-1.
3)
Turn the focusing knob of the tester until the flange back (f’F) of the checking lens is “44.56 mm”.
Note:
When turning the focusing knob of the tester, chart image check is not required.
4)
Turn the focusing ring of the checking lens until red and green color areas are equal on the chart while looking through the micro-
scope.
Note:
If in-focus point cannot be obtained even through the focusing ring is fully turned, perform the following steps (1) to (4) and
shift the position of the focusing ring. (Refer to Fig.4-4-6.)
(1) Set the focusing ring to the infinity stop position, and hold the distance tube block.
(2) Loosen the six screws fixing the focus operating ring.
(3) Turn the helicoid in the direction of the arrow (screw in direction), and tighten the six screws loosened in step (2) temporarily.
(4) Perform the step 4) again.
Fig.4-4-6
Focus Operating Ring
Focusing Ring
Screws
Screws
Screws
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