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Iris Attachment for Light?


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#1 Brian Rose

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Posted 04 August 2016 - 10:46 AM

Hey all!

 

I'm trying to pull off a particular lighting effect for my documentary.  I want to highlight particular details on a photograph, and would love to do an effect akin to the old silent film iris in/out where in a spot of light on the document/photo contracts or expands.  Is there an iris type attachment I can mount on the end of a snoot, to achieve this effect?  

Your help would be most appreciated!

 

BR


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#2 Shachar Alfie

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Posted 04 August 2016 - 11:14 AM

you can mount an iris on an ETC S4

 

http://www.bhphotovi...ageID/accessory


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#3 JD Hartman

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Posted 04 August 2016 - 11:16 AM

For even greater control, rent a followspot.


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#4 Stuart Brereton

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Posted 04 August 2016 - 06:32 PM

For even greater control, rent a followspot.

He's trying to light a photograph. I think a followspot might be overkill...


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#5 Shawn Sagady

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Posted 04 August 2016 - 06:38 PM

Yes you can put an iris into a Source 4, this is probably your best bet.  The iris must go into the focal plane of the light or it wont have sharp edges. 


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#6 Gregg MacPherson

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Posted 04 August 2016 - 06:52 PM

Maybe someone knows how these effects were done back then.  Was it basically a matte effect,  with an "iris" in front of the lens?


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#7 David Mullen ASC

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Posted 04 August 2016 - 07:31 PM

Basically the silent camera people used something like a theatrical lamp iris in front of the lens. This is the one that goes into a Source-4 ellipsoidal:

 

http://vignette4.wik...=20120721230305


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#8 JD Hartman

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Posted 04 August 2016 - 07:34 PM

He's trying to light a photograph. I think a followspot might be overkill...

 

Doesn't have to be a traditional 2k followspot or a Xenon.  It can be as small as a 575w.  Just an alternative to a S4 Leko with an iris.


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#9 Stuart Brereton

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Posted 04 August 2016 - 07:44 PM

Dedolight make an iris for their Tungsten heads. A focusable 150w lamp should be ample to light a photograph.


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#10 David Mullen ASC

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Posted 04 August 2016 - 07:50 PM

If it's just to light a photograph, you might as well just cut a round hole in some black card and put it on a c-stand in front of the light.  But if you need it to close in / open up you need an iris.


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