Focus/Iris controller

Hey Bob, can you make one of these to work with a Fuji lens? I would love to have something like this for the pan bar when using my JVC HD100.
 
how preicise are they? would a lower watte or lower kohm make them more so, or would a larger watt/ohm make them more so?

or is 20k the requirment? would 10k ot 25k work?

Jason
 
If I understand this discussion correctly, a potentiometer wired in series to the focus plug on a hvx200 can control the focus settings.
Does this mean that, given a range of say one to ten, one representing the clockwise extreme and ten representing the counterclockwise extreme of travel in the pot, that each discrete point in between, two, three and so on will represent a specific point of focus on the lens?
 
so I got the stuff to build this and I hyave two quick questions, I'm hoping you'll this this and answer tonight.

the two jacks, the stereo and sub mini, both have 3 wire intakes two + and one ground, I'm assuming both pots are hooked to the ground and one to each of the poss.

question two, the record button, does it go into the second intake of the zoom plug? or do I need to rig up a third plug for it. and if so once again, + to + on each then each to the ground?

thanks
Jason Miller
 
never mind both those questions are answered by just taking the time to look at your diagram, my bad,

the answer to both questions is yes

thanks
Jason Miller
 
I'm not sure about the focuse yet, but I know that is true for the iris, and it is not true for the zoom, the zoom, pot works like the toggle on the camera, the harder you push it the faster it goes, same with the pot, the more you turn it the faster it zooms, but at what ever seep it keeps zooming untill you turn the pot back to 0 I was hoping for a turn zoom ratio that was repeatable. I still may be able to make it work with the moco, with timing rather than points in space. will find out soon enough I guess.

Jason
 
finished mine tonight, it works great, not sure if i can use it with the moco, as the pot controlls the zooms speed rather than possition, however i can controll the focus with a servo as it and the iris corrispond with the pot. will post images and maybe a video of it soon. looks like something out of the world of tomorrow.

Jason
 
mjjason said:
Anyone have a detailed parts list for this?
Click to expand...

You raise a great point, one that has frustrated me lately. When I post something I tell other people how they can do it too.

Lately, the DIY section feels more like show and tell. "Hey, look what I made!" What we all need as filmmakers is to SHARE OUR KNOWLEDGE.

I share just about everything I've learned. Something like this thread only has value if you're willing to share how you did it.
 
Jason Miller said:
everything you need is in the photos and diagram, its pretty easy, pots botton box, wires, and connectors.
Click to expand...

I owe you an apology. I confused your post with a different one I saw yesterday. Your post is more detailed than 90% on the thread.

I think it would help to add:

1.) A parts list
2.) A step-by-step instruction guide

But, at least you show the inside of your device. Many of the recent DIY posts are simply "Look at what I made!" The entire point of the DIY section is to educate other filmmakers so we spend less money on gear.
 
Jason Miller said:
everything you need is in the photos and diagram, its pretty easy, pots botton box, wires, and connectors.
Click to expand...
Yeah, after posting I realized the iris/focus control were connected to a separate jack. The one thing that is still confusing me is in the diagrams he list auto/manual switches but for the life of me I can't seem to see them or even understand why they are there.
 
mjjason said:
Yeah, after posting I realized the iris/focus control were connected to a separate jack. The one thing that is still confusing me is in the diagrams he list auto/manual switches but for the life of me I can't seem to see them or even understand why they are there.
Click to expand...
Have same kind of issues.... the FOCUS switch I can understand, put the camera on A/F and when you push this button, it will override the A/F... nice :beer:

The IRIS and ZOOM switches have only the ON/OFF function. For the ZOOM I don't mind, if it is on the right position, turn it off and it is secured. I do miss the function between the AUTO IRIS and MANUAL IRIS. Of course I prefer to use the MANUAL IRIS but sometimes it can be handy to swap back to AUTO IRIS. Don't know or it is possible with a DVX, should be nice :Drogar-Dum(DBG):
 
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