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C2946M-D (6/08) 25
Lens Focusing
After mounting the lens, you must focus your C10CH Series camera. You will adjust both the back focus (on the camera) and the fine focus (on the
lens).
NOTE: The back focus has already been adjusted using a standard CS mount lens. However, you might need to adjust it again to match the
mounted lens.
1. Auto iris only: Cover the auto iris lens with a suitable neutral density (ND) filter; this opens the iris fully. For best results, use an ND3 filter.
2. Manual iris only: Open the iris completely. Figure 7 shows the manual iris, varifocal, and lens focus locking screws for a sample lens.
Refer to your lens documentation for more information.
Figure 7. Lens Focus
3. If AGC is set to OFF, set it to LOW or HIGH on the FUNCTION SETTINGS menu. AGC is set to LOW by default.
a. Display the FUNCTION SETTINGS menu.
b. Change AGC to either LOW or HIGH.
c. Select EXIT to save the AGC setting.
4. Aim the camera at the farthest object in the field of view. Make sure it is at least 6.5 ft (2 m) away.
5. Fixed focal length lens only:
a. Set the lens focal length to far (
∞).
b. Adjust the back focus.
c. Use a 1.5-mm Allen wrench to loosen the back focus locking screw.
d. Turn the lens until the image is focused. Tighten the back focus locking screw clockwise.
(Back focus is a coarse adjustment. You will make the fine focus adjustment in the next step.)
e. Adjust the lens focus to achieve the best fine focus.
WARNING: Do not overtighten the back focus locking screw because you may damage the camera.
VARIFOCAL
LOCKING SCREW
BACK FOCUS
LOCKING SCREW
LENS FOCUS
LOCKING SCREW
MANUAL IRIS
LOCKING SCREW
1.5 MM ALLEN WRENCH