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Manual Linear slide for field macro-cinematography

 
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markdeeble



Joined: 23 Mar 2011
Posts: 2

PostPosted: Tue Mar 20, 2012 11:47 pm    Post subject: Manual Linear slide for field macro-cinematography Reply with quote

Hi

I am looking for a hand-cranked manual slide (leadscrew/ rack and pinion etc) for use in field macro cinematography.
I need the distance of travel to be c 4" and it to be able to hold c 10lb. Something like a Velmex Unislide or proxxon compound table top would be good, but I would like the hand wheel offset at 90 deg to the direction of stage travel as I would like to be able to follow focus with it.
Does anyone have any ideas how I might achieve this please?
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Craig Gerard



Joined: 01 May 2010
Posts: 2600
Location: Australia

PostPosted: Tue Mar 20, 2012 11:58 pm    Post subject: Reply with quote

First post....welcome!

Interesting project, hope you will keep us updated Cool

Velmex do make a right angle crank.

I'll find some details and upload.

*Later note: scroll down this page:
http://www.velmex.com/manual_examples1.html
also
http://www.velmex.com/manual_gear_drives.html



If you want a smooth, silky glide, go with a Velmex UniSlide. The Proxxon is too course and the controls require too much finger strength which leads to an inconsistent, bumpy visual ride (and sore fingers).

There is simply no comparison between a Velmex UniSlide and a Proxxon milling/drilling table.

Hope this is helpful for now.


Craig
_________________
To use a classic quote from 'Antz' - "I almost know exactly what I'm doing!"


Last edited by Craig Gerard on Wed Mar 21, 2012 12:12 am; edited 1 time in total
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markdeeble



Joined: 23 Mar 2011
Posts: 2

PostPosted: Wed Mar 21, 2012 12:09 am    Post subject: Reply with quote

Wow! - that was quick - thanks Craig.
The right angle gear looks to be what I need, combined with a unislide. I've not seen the compound table, but I'd seen another member here recommend it some time ago.
I've got a macro-bench utilizing motorized velmex slides, but that moves the subject rather than the camera ( I used it to film fig wasp behaviour ). Now I am looking for something more manual that I can mount on a tripod and use in the bush. Key for me though is the ability to be able to follow focus as the insect moves, so I think the silkier the movement the better... Smile
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