Shooting; Adjusting The Flange Focal Length - Sony DXC-390 Service Manual

Shooting

Adjusting the Flange Focal Length

This section explains how to adjust the flange focal length
(distance from the lens mounting plane to an object).
Adjustment method varies with the lens you use.
When you use the VCL-610WEA zoom lens
Desired shooting
distance to the object
or about 3 m (10 feet)
1
Object, such as letters, fine
patterns, etc., on which you
can observe the focus
condition distinctly
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(GB) Chapter 2 Operation
When you use the VCL-614WEA zoom lens
You do not need to use the FLANGE BACK (flange focal
length) adjustment ring on the camera.
Desired shooting
distance to the object or
about 3 m (10 feet)
1
Object, such as
letters, fine patterns,
etc., on which you can
observe the focus
condition distinctly
DXC-390/390P
6
2
4
3, 5
RM-C950 remote
control unit
6
5, 6
3
4, 5, 8
2, 9
OPERATION MODE
FOCUS ZOOM IRIS
MyA MyA MyA
FOCUS
ZOOM
IRIS
The following is an example of flange focal length
adjustment using the RM-C950 remote control unit. Adjust
it using the FLANGE BACK (flange focal length)
adjustment ring on the camera.
Note
Be sure to set the iris fully open before adjusting the flange
focal length.
1
Point the camera to an object at the desired shooting
distance or about 3 m (10 feet) away.
2
Set the IRIS AUTO/MANUAL knob to MANUAL, and
turn the IRIS knob to OPEN as far as it goes.
3
Turn the ZOOM knob to TELE (telephoto) as far as it
goes.
4
Adjust the focus on the object used in step 1 by turning
the FOCUS knob.
5
Turn the ZOOM knob to WIDE (wide-angle) as far as it
goes.
6
Adjust the focus on the object used in step 1 by turning
the FLANGE BACK (flange focal length) adjustment
ring on the camera.
7
Repeat steps 3 to 6 until you achieve sharp focus both in
the telephoto and wide-angle positions.
Now the flange focal length adjustment is completed.
You do not need to readjust the flange focal length unless
you replace the lens.
Note
Be sure to set the iris fully open before adjusting the flange
focal length.
1
Point the camera to an object at the desired shooting
distance or about 3 m (10 feet) away.
2
Set the FOCUS, ZOOM, IRIS M/A switches on the lens
to M (Manual) position using a pointed object.
3
Turn the iris ring to 1.4 (open).
4
Turn the fixing screw for the F.f adjustment ring
counterclockwise to loosen it.
5
Turn the ZOOM ring clockwise to align 5.5 (wide-
angle) with the white line, then turn the F.f adjustment
ring by holding the F.f fixing screw to adjust the focus
on the object used in step 1.
6
Turn the ZOOM ring counterclockwise to align 77
(telephoto) with the white line, then adjust the focus on
the object.
7
Repeat steps 5 and 6 until you achieve sharp focus both
in the telephoto and wide-angle positions.
8
Turn the fixing screw for the F.f adjustment ring
clockwise to tighten it firmly.
9
Set the FOCUS, ZOOM, IRIS M/A switches on the lens
to A (Auto) position.
Now the flange focal length adjustment is completed.
You do not need to readjust the flange focal length unless
you replace the lens.
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Chapter 2 Operation (GB)
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