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35mm 28-70 Canon Zoom vs. Super 35 - difference in negative?


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#1 Fernando Nicolas

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Posted 25 March 2007 - 05:34 AM

Is the aspect ratio almost the same if I'm at a 50mm focal length on an slr lens vs. super 35? Thanks.
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#2 David Mullen ASC

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Posted 25 March 2007 - 09:15 AM

Is the aspect ratio almost the same if I'm at a 50mm focal length on an slr lens vs. super 35? Thanks.


The lens doesn't determine the aspect ratio - a lens projects a circular image. The gate and later cropping determine the aspect ratio (the ratio of height to width in a rectangle). The lens determines perspective and field of view.

If you're asking if a 50mm has the same field of view on a 35mm SLR versus Super-35, the answer is no -- the 35mm still camera format is 8-perf horizontal and the 35mm motion picture format is usually 4-perf vertical. So a 50mm lens behaves more wide-angle on an SLR.

As far as aspect ratio, the 8-perf 35mm still format (same as VistaVision) at Full Aperture is about 1.5 : 1, whereas the 4-perf Super-35 aperture is about 1.33 : 1.
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#3 Joe Sexton

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Posted 25 March 2007 - 01:28 PM

I assume that you are talking about field of view, and if so a 50mm slr lens, on a super 35mm camera, would have about the same field of view as a 90mm lens on a slr camera. If you want exact conversions there is a field of view converter on panavisions web site.

Edited by Joe Sexton, 25 March 2007 - 01:30 PM.

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