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anamorphic prism?


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#1 Gordon C

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Posted 12 August 2011 - 11:15 PM

I saw there is an alternative to building an anamorphic lenses for projection purposes and I suspect I could use it to film it right in front of my DSLR. But the problem is I want to know if there is any formulas to ensure us that I am getting the image squeeze that I prefer.
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#2 dan kessler

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Posted 13 August 2011 - 12:27 AM

Here is a link you might want to check out:

www.zuggsoft.com/theater/prism.htm

There you will learn about some of the drawbacks of
anamorphic prisms.
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#3 Gordon C

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Posted 13 August 2011 - 06:43 PM

Thanks Dan, in fact I found it from that site at first but right now I have two wedges but don't know how to assemble them because I need to find a viable math formula to correctly place each prism in the right place to get the ratio magnification I want. I want to make my prism squeeze from 16:9 to 2.40:1.
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#4 dan kessler

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Posted 13 August 2011 - 09:07 PM

Well, your first calculation will be 2.4/1.78 = 1.348

This is your anamorphic squeeze ratio.

After that, things get a little trickier.

When I google 'anamorphic prisms,' all sorts of
diagrams appear, but no simple formulae.

Looks like you'll have to do some digging.
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#5 Gordon C

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Posted 14 August 2011 - 01:43 PM

Haha, alright, time to research!
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Metropolis Post

Tai Audio

Media Blackout - Custom Cables and AKS

Visual Products

CineTape

Paralinx LLC

Abel Cine

Technodolly

rebotnix Technologies

Gamma Ray Digital Inc

Ritter Battery

Willys Widgets

Broadcast Solutions Inc

Wooden Camera

Opal

FJS International, LLC

Aerial Filmworks

The Slider

Glidecam

CineLab