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110 PIXIS System Manual Version 2.C
F-Mount Adapter Focusing Procedure
Note: This procedure sets the focus for the F-mount adapter, not the lens. Once set, it
should not need to be disturbed again.
1. The lens should be mounted to the camera as described in Chapter 4.
2. The F-mount adapter is in two sections: the adapter body (into which the lens is
mounted) and the adapter adjustment ring that is secured to the front of the camera.
Try rotating the adapter body. If it doesn’t rotate, you will have to loosen the securing
setscrew(s) in the side of the adapter adjustment ring. To change the
focus setting, proceed as follows.
Loosen the setscrew(s) with a 0.050 hex key
*
. Do not
remove the screw(s); loosen just enough to allow the
adapter body to be adjusted.
Set the lens focus adjustment to the target distance.
3. Block off the lens and set it to the smallest possible aperture
(largest F-stop number).
4. Mount a suitable target at a known distance in front of
the lens. Typically, a photo resolution chart is used. However, even a page of small
print will generally serve quite well for this purpose.
5. Verify that all cables and connectors are secured.
6. Turn on the system and start the WinView/32 software.
7. Set the software to the FreeRun and Safe modes (consult the software manual if
you are unfamiliar with these modes). Choose a fast exposure (.1 ms) and begin data
collection by selecting Focus.
8. Slowly uncover the lens. If the image becomes washed out, recover the lens, choose a
shorter exposure, and uncover the lens again. If it is too dark, choose a longer
exposure.
9. Double check to be sure the lens focus is set to the target distance and readjust if
necessary.
10. Taking care not to disturb the lens focus, rotate the adapter body for maximum
sharpness in the observed image and tighten the setscrews to secure the adapter
body's position.
This completes the procedure for adjusting the F-mount adapter. It should not be
necessary to disturb the adjustment again. In actual measurements with real subjects, the
focusing will be done entirely with the lens focus adjustment.
*
The screws are #4-40 setscrews. A 0.050 hex key is required to loosen or tighten them.
Figure 70. F-mount Adjustment