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beter than 1:1 macro with a bolex


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#1 Graham Aston Burt

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Posted 12 February 2007 - 12:33 PM

I want to get better than 1:1 with c mounts and extension tubes, is it possible?

Is there a way to get 3:1? I'm not against building something myself.
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#2 Stephen Williams

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Posted 13 February 2007 - 03:32 AM

I want to get better than 1:1 with c mounts and extension tubes, is it possible?

Is there a way to get 3:1? I'm not against building something myself.


Hi,

With lots of extention tubes probably yes. Expect to loose about 5 stops!

Stephen
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#3 Clive Tobin

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Posted 13 February 2007 - 08:59 PM

...With lots of extention tubes probably yes. Expect to loose about 5 stops!


You will get much better image quality with most lenses if you reverse the lens for extreme magnification. In other words, the end that would normally face the film will face the subject. Otherwise all of the optical corrections in the lens will be defeated and the image may look like you used the bottom of a Coke bottle.
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#4 Glenn Brady

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Posted 14 February 2007 - 02:07 PM

If you can find one, the macrophotography accessory made for Bolex H-16 cameras (code NOFOF) is quite handy, providing more flexibility than extension tubes (http://bolexequipmen...acrofilming.htm).

Edited by Glenn Brady, 14 February 2007 - 02:08 PM.

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#5 James Erd

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Posted 14 February 2007 - 02:21 PM

I want to get better than 1:1 with c mounts and extension tubes, is it possible?

Is there a way to get 3:1? I'm not against building something myself.


I went that route my self. I happened to have a Leica camera with screw mount lenses and I had bought the adapter to C-mount years ago. All that was missing from my rig was a bellows extension. I happen to see one at Keeble and Suchet in Palo Alto which I pict up for about $50. The whole thing is pretty unwieldy when I put it all together but depending on what lens I stick on the from I can get some amazing shots though on higher magnifications the light does fall off quite a bit.
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