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Give me a hand with this accessory


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#1 Guilherme Panisson

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Posted 10 August 2013 - 01:34 PM

Hi,
 
I've bought a Bolex Rex 5 and it came with a Bellow Extension Unit and with this accessory (see picture) that I don't what it is used for.

wvv4.jpg
 
I couldn't find any information on the internet about it too. Any idea?
Thanks in advance.


Edited by Guilherme Panisson, 10 August 2013 - 01:37 PM.

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#2 Chris Millar

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Posted 10 August 2013 - 11:01 PM

Looks a bit like a large format shutter.

Hrrm...
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#3 steve waschka

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Posted 11 August 2013 - 01:22 PM

Agreed. The bellows extension units, if the right dimension, are often used for copying images. Using the I/T selector on the body, you can change the shutter on the camera to stay open. Then control exposure in detail with that accessory shutter. Or great for stop motion. Prob a lot of work for time lapse. But it would even out the differences in available light. Although I have a bolexs with adjustable shutters and if you needed more exposure than the shutter angle provided and timing it wasnt quite accurate enough then you would need one of those accessories.


Edited by steve waschka, 11 August 2013 - 01:27 PM.

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#4 Guilherme Panisson

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Posted 11 August 2013 - 05:25 PM

Thx for the tips.

Im having trouble in focusing with the 75mm yvar with bellow extension. Im only getting focus in the viewfinder when the lens is very closed to the iris. When i moved the lens foward a bit, i get out of focus.
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#5 Guilherme Panisson

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Posted 11 August 2013 - 05:35 PM

Thx for the tips.

Im having trouble in focusing with the 75mm yvar with bellow extension. Im only getting focus in the viewfinder when the lens is very closed to the iris. When i moved the lens foward a bit, i get out of focus.
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#6 Simon Wyss

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Posted 12 August 2013 - 12:57 AM

Your first contact with macrophotography

 

Towards 1:1 magnification, that is the object is pictured its own size on the film, the lens extension becomes as long as the object distance. You have to move camera and lens.

 

Of course you focus with the iris open in order to see best through the reflex finder. Light measurement, stop down, and expose.


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#7 steve waschka

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Posted 12 August 2013 - 11:51 PM

Sorry... my explanation reads like my 4 year old banged it out on a kindle. I meant to convey that a bolex with an adjustable shutter may not provide enough light for some single frame, long exposure situations. Forcing you to time it via a stopwatch. That may not be precision enough so maybe the accessory shutter would solve that issue as well.

 

But all those accessory tubes in your pic scream macro photography.


Edited by steve waschka, 12 August 2013 - 11:54 PM.

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#8 Guilherme Panisson

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Posted 16 August 2013 - 02:00 PM

That's fine. Actually the main problem is that I can't amount this lens to the camera. It does not fit. It may be designed for a different model.


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#9 Glenn Brady

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Posted 18 August 2013 - 07:06 AM

This appears to be a shutter assembly for a copystand - like the Leitz Aristophot or Nikon Multiphot - and may not have anything to do with the Bolex. 


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#10 steve waschka

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Posted 22 August 2013 - 08:42 AM

There you go. I cant tell you how many times i got a neat piece of gear along with another purchase. And the two were completely unrelated. I used to think people may not have been truthful about their knowledge of the equipment or it wasnt actually theirs. But I eventually realized they just havent used it in so long they cant remember what was what.


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#11 Guilherme Panisson

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Posted 22 August 2013 - 05:35 PM

Haha, probably.

 

Thanks for the info you all. 

Glenn Brady

I think youre right, though I've researched in several sites about copystand, lens, shutter assembly and didn't find anything similar to this one. 

Well, I'll keep it at the bottom of my drawer.


Edited by Guilherme Panisson, 22 August 2013 - 05:37 PM.

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