Canon ITS-ME, Руководство по эксплуатации

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E11
4 ADJUSTMENT
Flange back
adjusting ring
Flange back
lock screw
Flange back
lock screw
Extender lever
4 ADJUSTMENT
Before starting adjustment
Before operating the iris, zoom or focus manually, make sure to set
the Auto/Manual selecting switches at the front of the lens drive unit
to “M” position.
4-1. BACK FOCUS ADJUSTMENT OF THE LENS
If the relationship between the image plane of the lens and the image plane of the television camera is
incorrect, the object goes out of focus when the lens is zoomed. Adjust the back focus of the lens as follows.
1
Select an object at an appropriate distance [HJ14ex: 1
to 3 meters, HJ17ex/HJ22ex/KJ17ex/KJ22ex/KJ20x:
2 to 5 meters, HJ18ex: 5 to 7 meters recommended].
A Siemens star chart is preferable for this
adjustment. If no such chart is available, use any
object that offers sharp contrast to facilitate the
adjustment work.
↓
2
For a lens with a built-in extender, set the
extender lever to 1x.
↓
3
Set the iris fully open.
↓
4
Set the lens to the telephoto by turning the zoom ring.
↓
5
Bring the object into focus by turning the focus ring.
↓
6
Set the lens to the widest angle by turning the
zoom ring.
↓
7
Loosen the flange back lock screw, and turn the
flange back adjusting ring to bring the object into
focus.
↓
8
Repeat steps 4 to 7 a few times until the object is
brought into focus at both the widest angle and
telephoto.
↓
9
After making sure that the object is in sharp
focus, tighten the flange back lock screw.
The adjustment procedure is now completed.
NOTE
Refer to “5 OPERATION” as for details on zooming,
focusing, and iris operation performed with the back
focus adjustment.
Auto/Manual Iris
selecting switch
Auto/Manual Zoom
selecting switch
Auto/Manual Focus
selecting switch
Siemens star chart