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Bartech handset: how to calibrate the speed of forward or reverse switch?


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#1 Federico Rizzo

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Posted 04 June 2013 - 05:04 PM

I want to use the forward or reverse switch in the Bartech to shoot with zoom lenses. Is there a way to calibrate the speed of the switch? 


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#2 Victor Lazaro

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Posted 04 June 2013 - 05:52 PM

Are you talking about this? http://webpages.char...artech/buz.html


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#3 Brian Freesh

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Posted 04 June 2013 - 07:59 PM

Clarification would help. My interpretation is that you want to use a standard BFD (or perhaps a BDR) to remotely zoom during a shot. This works, but as far as I know there is no way to change the speed of the motor as on a Preston.  Though I've never used a BDR, so maybe that would be an option.

 

I have no idea why the switch would come into play.  I guess a crash zoom with less effort? I can throw a BFD focus wheel from one end to the other pretty fast, if the motor could keep up with me I'm sure it would be a great crash zoom.

 

Please clarify exactly what you are trying to achieve and we can help you better.


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#4 Federico Rizzo

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Posted 05 June 2013 - 07:36 AM

Yes Brian

 

You are right. I want to use a standard BFD (or perhaps a BDR) to remotely zoom during a shot. I'd like to change the speed of the motor as on a Preston, faster or slowly without rotating the knob but only using the switch forward or reverse. It seems not possible.

 

Federico 

 


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#5 Victor Lazaro

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Posted 05 June 2013 - 09:51 AM

It is not possible on the Bartech, ah you need to give a few things on a device that is 6 times cheaper.
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#6 Brian Freesh

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Posted 05 June 2013 - 12:30 PM

What is 6 times cheaper? A single BFD unit is about 1/6 the cost of a 3-Channel Preston FIZ, but a single BFD is only doing 1/3 the job.

 

A BFD is about 1/2 the cost of a single Channel Preston, and 3 BFDs are about 1/2 the cost of a 3 Channel Preston.

 

Not sure of the breakdown with BDRs and the Iris slider upgrade to the hand unit, but I imagine you're still in the 50% range, which is still a fantastic deal considering what you get, but it's certainly no 16.6%!!


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#7 Quaid Cde Baca

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Posted 25 September 2013 - 08:32 PM

only thing that "may" help would be to calibrate a shorter distance thus giving you the full pull of the hand unit wheel to turn the small lens distance. (good for close focus)


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