Canon UHD DIGISUPER 90 manual for UJ27x6.5B - Page 47

Back Focus Adjustment, 3 Removing and, Installing the Lens, Shroud, 4 Iris Gain Adjustment

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2 PREPARATION 2-2 Back Focus Adjustment If the relationship between the image plane of the zoom lens and that of the television camera is incorrect, the object goes out of focus when the lens is zoomed. Follow the steps below to adjust the back focus of the lens. 1 Select an object at an appropriate distance (UJ90x/ UJ86x: 10 to 15 m, UJ27x: 3 to 5 m recommended). Use any object with sharp contrast to facilitate the adjustment work. 2 Set the lens to 1x [status without using an extender]. 3 Set the iris fully open. 4 Set the lens to the telephoto end. 5 Bring the object into focus by focus operation. 6 Set the lens to the widest angle. 7 Loosen the F.B. lock knob, and then turn the F.B. adjusting knob to bring the object into focus. 2-3 Removing and Installing the Lens Shroud When any electrical setting or adjustment is required, remove and install the lens shroud following the steps below. Fastener type 1 Release the fasteners on both sides of the lens shroud, then pull the shroud forward to remove from the lens body. 2 When installing the lens shroud back in place, align the shroud to the guide rails of the lens body, and then push the shroud until it stops at the end of the mount. Press the shroud fasteners near to the end of the mount side to lock the shroud. Recessed Handle (Both sides of the lens) Fastener Lens Shroud F.B. Adjusting Knob F.B. Lock Knob 8 Repeat steps 4 to 7 several times, until the object is brought into focus at both the widest angle and telephoto ends. 9 After making sure that the object is in sharp focus, tighten the F.B. lock knob. The adjustment procedure is now completed. * (NOTE) Make sure that the fasteners of the lens shroud are always locked when it is mounted on the lens. 2-4 Iris Gain Adjustment The iris gain is set to the middle of the adjusting range at the factory. However, if the iris gain needs to be changed for some reason, follow the steps below. These steps can be taken by the trimmer adjustment or on the information display. (The setting implemented last takes precedence) * (NOTE) For other iris adjustment such as iris ends adjustment or video level adjustment when the extender is used, contact Canon dealer or your Canon sales representative. E9

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E9
2
PREPARATION
2-2 Back Focus Adjustment
If the relationship between the image plane of the zoom
lens and that of the television camera is incorrect, the object
goes out of focus when the lens is zoomed. Follow the steps
below to adjust the back focus of the lens.
1
Select an object at an appropriate distance (UJ90x/
UJ86x: 10 to 15 m, UJ27x: 3 to 5 m recommended).
Use any object with sharp contrast to facilitate the
adjustment work.
2
Set the lens to 1x [status without using an extender].
3
Set the iris fully open.
4
Set the lens to the telephoto end.
5
Bring the object into focus by focus operation.
6
Set the lens to the widest angle.
7
Loosen the F.B. lock knob, and then turn the F.B.
adjusting knob to bring the object into focus.
F.B. Adjusting Knob
F.B. Lock Knob
8
Repeat steps
4
to
7
several times, until the object
is brought into focus at both the widest angle and
telephoto ends.
9
After making sure that the object is in sharp focus,
tighten the F.B. lock knob.
The adjustment procedure is now completed.
2-3 Removing and
Installing the Lens
Shroud
When any electrical setting or adjustment is required,
remove and install the lens shroud following the steps
below.
Fastener type
1
Release the fasteners on both sides of the lens
shroud, then pull the shroud forward to remove from
the lens body.
2
When installing the lens shroud back in place, align
the shroud to the guide rails of the lens body, and then
push the shroud until it stops at the end of the mount.
Press the shroud fasteners near to the end of the
mount side to lock the shroud.
Fastener
Recessed Handle
(Both sides of the lens)
Lens Shroud
* (NOTE)
Make sure that the fasteners of the lens shroud are always locked
when it is mounted on the lens.
2-4 Iris Gain Adjustment
The iris gain is set to the middle of the adjusting range at
the factory. However, if the iris gain needs to be changed
for some reason, follow the steps below. These steps can
be taken by the trimmer adjustment or on the information
display. (The setting implemented last takes precedence)
* (NOTE)
For other iris adjustment such as iris ends adjustment or video level
adjustment when the extender is used, contact Canon dealer or
your Canon sales representative.