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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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