Difference between revisions of "Focusing the video lens"
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This page describes how to focus FUJINON video camera lens in DFNEXT camera systems (Point grey / FLIR digital cameras) using freeture video capture software. | This page describes how to focus FUJINON video camera lens in DFNEXT camera systems (Point grey / FLIR digital cameras) using freeture video capture software. | ||
| − | + | == Stop the freeture SW running as service == | |
systemctl stop freeture.service | systemctl stop freeture.service | ||
| − | + | == Run freeture in to display currently captured video live on screen == | |
Login as user which is not root locally (keyboard + monitor + mouse needed). | Login as user which is not root locally (keyboard + monitor + mouse needed). | ||
| Line 26: | Line 26: | ||
'' | '' | ||
| − | + | == Stop freeture == | |
By pressing [Esc] in the terminal window where it was started. | By pressing [Esc] in the terminal window where it was started. | ||
| − | + | == Start the freeture SW running as service again == | |
systemctl start freeture.service | systemctl start freeture.service | ||
Revision as of 04:15, 25 November 2020
This page describes how to focus FUJINON video camera lens in DFNEXT camera systems (Point grey / FLIR digital cameras) using freeture video capture software.
Contents
Stop the freeture SW running as service
systemctl stop freeture.service
Run freeture in to display currently captured video live on screen
Login as user which is not root locally (keyboard + monitor + mouse needed).
Switch user to root may be needed
su - root
Run freeture, zoom in, set window with video full screen or enlarge it to se the focus is sharp:
freeture -m 2 --display -g GAIN -e EXPOSURE_TIME
Use GAIN (0 .. 29.99) and EXPOSURE time (0-33000 us) appropriate for current lighting conditions.
In full scrren/enlarged mode, the image update may be slow or freeze. This is related to the CPU load - transferring image from video camera over USB and scaling it to screen buffer. Restart the above commend if that happens and zoom in only partially or zoom 1:1, but shrink the window.
A tiny hex key (size TBD - 0.8 mm or 0.6 mm) is needed to loosen the video lens focus fixing bolts. There are 3 of these tiny bolts - to access them, the lens needs to be removed from the camera box.
Note: Set the F-stop (mechanical lever on the lens) to full open, check if the focus is sharp as with f/1.8 or f/2.0. If yes, keep the wide open setting. If not, stop down to f/1.8 or f/2.0.
Stop freeture
By pressing [Esc] in the terminal window where it was started.
Start the freeture SW running as service again
systemctl start freeture.service
