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6. Adjustment of Lenses
Adjustment
This adjustment (distance between lens casing and sensor surface) is required if a sharp
of flange focus
definition cannot be obtained with the lens focussing, or in order to adjust the
∞
position.
for fixed focus lenses
To obtain a sharp definition, point the camera at an object which is at least 2000 times
further away from the front of the lens than the focal length. (If the focal length is
7.5mm, the object must be at least 15m distant from the camera).
Open the aperture fully and set the focus to
∞
(infinite).
If the lens has automatic exposure control, select a dark object, or better use an
ND filter (64-x) to ensure that the aperture is fully open.
Undo set screw
M
. Turn the lens with the CS mount connection until the definition is sharp.
When finished, retighten screw
M.
Adjustment
To obtain a sharp definition, point the camera at an object which is at least 5 times the
of flange focus for
minimum lens distance (MOD) of the lens. (If this is 1m, the object must be at least 5m
variable focus lenses
distant from the camera).
Open the iris fully and set the lens to the maximum tele position and focus with the
focus ring.
If the lens has automatic iris control, select a dark object (or use an ND filter, 64-x) to
ensure that the iris is fully open.
Set the lens to the maximum wide-angle position.
Undo set screw
M
and turn the C/CS ring on the camera until an optimal sharpness is
reached. Repeat the process for checking purposes, if necessary.
When finished, retighten screw
M
.
Note
The value stated in the diagram as
AL
(depth of thread of the lens with CS mount:
<- 5mm) must be observed. The camera may be damaged if this value is exceeded.
When installing a lens with CS mount, never use the C-mount adapter ring.
L
M
AL
K
M
L
C mount lens
CS mount lens
