VariZoom VZCINEMAPRO-JR-K2 - Manual (Page 8)

- 8 -
Lens
- This only needs to be changed if you are using camera lens controls other than
the VariZoom TOC system. In other words, if you’re connecting directly to a Canon or
Fujinon lens servo, or even a Preston system, you’ll need to go into this menu to set
things up properly.
Press the “menu” button to enter the main setup menu.
Select the “Lens” option.
When the “Current Lens” box is selected, pressing “enter” will change the selection.
Preston
If you are using a Preston MDR2, press the “enter” button until the box reads “Preston.”
Canon or Fujinon Analog Servos
If you are using a Canon or Fujinon lens with an analog zoom motor, press the “enter”
button until “default” appears.
Connect the Lens Control Cable
To set up the lens control, you need to first connect the lens cable to the servo jack(s) on
the lens itself (NEVER connect to the jack on the camera body where the lens plugs in, or
damage may occur). You will plug into the same jack(s) where you would plug in any
external lens control, so consult your owner’s manual if necessary.
Adjust the Voltages
You must then adjust the voltages in the lens menu so the lens servo responds properly –
you may notice the lens zooming on its own when you first connect the cable, but this is
normal. Start by adjusting the middle number until the lens servo stops zooming. If the
lens is all the way at one end of the range, you may have manually zoom the lens in or
out to reset the position in order to see if the servo is still moving. (Some people also flip
the lens servo switch to manual and just listen to hear the servomotor stop running)
Once you’ve set the middle number to the proper rest voltage, you need to make sure the
voltages on the left and right are equally far from the middle “rest” voltage. In other
words, if your rest voltage is 4.00, the left voltage could be 1.50 and the right 6.50.
If the difference is unequal, you’ll notice the lens zooms faster in one direction than the
other. The greater the difference, the faster the lens will zoom in that direction. The left
number should always be lower than the middle number and the right number should
always be higher than the middle number.