Handleiding
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3 Adjustment
3 Adjustment
3-1. 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 lens back
focus as follows.
1
Select an object at an approprate distance (approx.2 to 5
m). Use any object that offers sharp contrast to facilitate the
adjustment work.
2
Set the iris fully open.
3
Set the lens to the telephoto end by turning the zoom ring.
4
Bring the object into focus by turning the focus ring.
5
Set the lens to the widest angle by turning the zoom ring.
6
Loosen the flange back lock screw, and turn the flange back
adjusting ring to bring the object into focus.
7
Repeat steps 3 to 6 a few times until the object is brought
into focus at both the widest angle and telephoto.
8
After making sure that the object is in sharp focus, tighten
the flange back lock screw.
3-2. Iris gain adjustment
An iris gain adjusting trimmer is located on the front of the lens drive unit. The iris gain is set at
middle of range at the factory. However, if you wish to change the iris gain, adjust the trimmer
through the procedure described below.
1
Set the iris operation mode change-over switch to “A“ (auto).
2
Turn over/ remove the rubber cap which is attached here.
3
Turn the iris gain adjusting trimmer, using a small
screwdriver to set the level as desired.
C.W. ：higher sensitivity
C.C.W. ：lower sensitivity
As you watch the lens iris ring, adjust to a suitable gain at
which “focus hunting” does not occur.
4
After the iris gain adjustment is completed, put the rubber
cap back.
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11
16
4
5.6
1.9
2.8
20
8.
5
80
164
40
1.7
2.5
4
7
m
4.5
20
50
f t
12
C
RET
VTR
Shtl
1x
2x
M
F.B
Flange Back
Adjusting Ring
Flange back
Lock Screw
IRIS
A M
• •
T
W
Iris Operation Mode
Change-over Switch
Clockwise
Iris Gain Adjusting Trimmer
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Productinformatie
| Merk | Canon |
| Model | KJ20x8.2B KRSD |
| Categorie | Lens |
| Taal | Nederlands |
| Grootte | 2750 MB |
