Adjusting the Lens
Flange Focal Length AdjustmentIt is necessary to adjust the flange focal length (the | • When a lens is fitted for the first time | ||
distance from the lens flange to the plane of the image | • After changing lenses | ||
along the optical axis) in the following cases. | • When during zoom operations the focus does not | ||
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4,11 | 2 | 1 | 3 |
About 3 m (10 feet)
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| Test chart for flange |
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| focal length adjustment |
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| T | A |
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RET | W | M | IRIS | |
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8 | 6 | 7 | 5 |
ZOOM
SERVO MANU.
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3 Place the supplied test chart for flange focal length adjustment at a range of about 3 meters (10 feet), and adjust the lighting so that an appropriate video output level is obtained with the iris at F/1.8.
4 Loosen the F.B fixing knob.
5 Set the ZOOM selector to the MANU. position.
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7 Turn the focus ring so that the test chart is in focus.
8 Turn the zoom ring to the wide angle position.
9 Turn the F.B adjustment ring so that the test chart is in focus. Do not move the focus ring.
10Repeat steps 6 to 9 until the image stays in focus from telephoto to wide angle.
11After adjustment, tighten the screw of the F.B fixing knob.
Settings and Adjustments 5 Chapter
Chapter 5 Adjustments and Settings | 119 |