Zoom-Focus-Iris control

Does anyone know why the varizoom pzfi uses a 4-conductor 3.5mm mini plug for focus/iris?

vzrockpzfi_04.jpg
 
Hey, have any of you guys thought about making one of these puppies wireless? and also with a motor to power a follow focus?
 
basta73 said:
Does anyone know why the varizoom pzfi uses a 4-conductor 3.5mm mini plug for focus/iris?
Click to expand...

Because all 4 conductors are needed:
* Ground
* Focus Position
* Iris Position
* The "Auto - Manual" switch for one of Focus or Iris (I don't recall which)

- Mikko
 
Thanks Mikko,

I'm looking at Bob Hill's schematics and they seem based on a Tip Ring Sleeve (3-conductor) type plug. I guess I'll have to wait until the parts come in to find out. I'll post anything I figure out.


This is a great project.
 
The schematic breaks up the controllers into the focus/iris and zoom/pause. You can make a single controller and jumper the ground at the mini plugs. I made a single controller for all the functions and separate controls for the focus/iris and zoom/pause. The all in one unit I use on my camera stabilizer rig and the separate units I use everywhere else. Hopefully this helps sort out things a bit.

Bob
 
hi

so now i will try it - one last question before i´ll go and buy the stuff :)
when i make the "all in one" do i need 2 or just one miniplug?

thanks a lot - i hope my german supplier knows what these things are :)
 
100B has two jacks, one for zoom and record start/stop, and a second one for focus & iris.

The 100 and 100A have no provision for remote focus or remote iris control.
 
hi

i´ve got all the parts together - man they are expensive here in austria...
i´ve tried it and it works lika a charme! my hvx is pleased to be remote controlled :)

i will wire and put it together - then i´ll post some pics - thanks to all of you - was easier than i thought!
I´ve bought some slide-potis (like the fader on a mixer) - maybe this is an alternative for focus, because its very easy to use them with one finger! look here: http://www.potentiometer.com/alps_slide.cfm

also i´m trying to put two in series, one 20k+a 5k for fine adjustments for exact focus

lets see - next week it should be done ;)
greets
 
does anyone have any pictures yet its really hard for me to read the diagrams from bob. has anyone got the focus and iris control down? the zoom one would be nice to but i really would like to make a focus one.
 
This stuff looks awesome but I'm stuck back at the how Bob's schematics have three leads and the varizoom version has 4 - how does Bob's get away with only three leads for the focus/iris controller?
 
I broke the controllers into two different units. If you combine everything the sleeve is the same as for both controllers. Hopefully that makes sense, if not I'll draw up a another diagram showing everything in one package as it were.

Bob
 
how smooth are the zooms? can you do a nice gradual "hollywood" zoom, with out the abruptness of the servo zoom?
 
please would it be possible to see pics of how the solders are on the pots and where they are connected on the mini plugs?

i see on the pots it has like 4 connections. im not sure which do what and which to connect.
also on them mini plug issue, do you mean that the middle 2 spots on the four point plug is the same and the middle point on the three point plug?

then if the tip and the back are the two that control the focus and iris which does with like focus tip and iris back?

the schematics are really confusing to me and i really want to get it right so i dont break the camera.

im sorry for being such a noob but just wish there was a pic of the whole things showing all the connections.
 
anchoryanker said:
how smooth are the zooms? can you do a nice gradual "hollywood" zoom, with out the abruptness of the servo zoom?
Click to expand...
would seem to me that this is a function of the servos and not the controller .. i think the servos on the dvx just start out at too fast of a rate for a true gradual zoom.. only way to defeat that woudl be something like a follow focus type physical device on the zoom ring
 
awsome cant wait to see the pics and build one myself! i got a shoot this weekend it owuld come in very handy with my camera crew
 
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