CinePlex v3 Manual - Plexon Inc

2 Determine the distance from the camera to the arena in meters
This distance should be as far as possible from the arena, while still close
enough to allow the zoom function to fill the sensor with the arena image. Be
sure to allow space for camera mounting. Find that distance on the X-axis
(Camera Distance) of the Standard Varifocal chart.
3 Determine the size of the arena in meters
Imagine a circle, square or 4:3 rectangle drawn around the arena, completely
enclosing it. The Arena Size in the charts above is the diameter of the circle,
the side of the square, or the longer side of the 4:3 rectangle. Find that size on
the Y-axis (Arena Size) of the Standard Varifocal chart.
4 Determine if the arena size and camera distance are optimal
If the (X,Y) position specified by the Camera Distance and Arena Size is in the
area between the Green and Blue lines, the setup should yield optimal results
when the camera is zoomed appropriately. It is not necessary to proceed. The
Standard Varifocal lens will work. If the (X,Y) position specified by the Arena
Size and Camera Distance is NOT in the area between the Green and Blue
lines, the setup is sub-optimal. The image will be smaller than desirable,
larger than desirable, or out of focus.
5 If the position is not optimal, try the steps above on the chart for the Zoom
lens
If this lens yields an optimal result, contact Plexon to obtain the lens. If not, try
adjusting Arena Size and Camera Distance to find an optimal combination
with one of the lenses.
6 If an optimal result cannot be obtained using this procedure, contact Plexon
for other lens possibilities
Note:
The charts are derived from calculated numbers. Small variations in
lens and camera manufacturing can result in as much as 10% variation.
Version 3.0 C-4