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TM/TMC/RM/RMC-2030CL
22
Installation
There should be an obvious need to refocus the lens before attempting to change the back focus. This is a very
exacting task. Some cameras have been returned to the factory to reset the back focus after failed attempts to
change the focus by customers. It might be wise to label cameras whose back focus was adjusted.
1.
The camera must be connected to a monitor before attempting to adjust the back focus.
2.
To back focus the camera, first attach a C-mount lens in the mount. Be certain that the lens is properly
seated.
3.
Next set the lens focus to infinity (if the lens is a manual iris, set the iris to a high f number while still
retaining a well illuminated image).
4.
Loosen the three miniature hex set-screws (use a 0.9 mm hex wrench) that lock the focus ring in place (two
screws for a CS-mount). Slowly turn the lens and focus ring assembly back and forth until you obtain the best
image of the desired object. This sets the back focus. Once the best image is obtained, tighten the focus ring
set-screws until they are snug. Do not over-tighten the screws.
Note: Mini-bayonet cameras adapted to C-mount do not have the back focus feature.
Figure 37.
Back Focus Set-Screw Locations
Содержание RM-2030CL
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