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Normal focal length?


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#1 David Bradley

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Posted 03 April 2007 - 07:02 PM

Anyone know what focal length would create a relatively objective image on a DSR 570 WS 16:9 2/3" CCD camera?

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David Bradley
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#2 Michael Nash

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Posted 03 April 2007 - 07:43 PM

Seems we just had this thread recently...

It depends on both what you consider "normal" and what you want to compare it to. A 23mm lens on a 2/3" 16x9 chip gives you similar angle of view to a 50mm lens on 35mm Academy 1.85:1.

This may help: http://www.panavisio...lenseqvform.asp

But in a pinch just remember that 2/3" optics behave rather like 16mm, using focal lengths close to 1/2 that of 35mm. From there you have to adjust your figure up or down a bit depending on what you're comparing (which aperture/format of 35mm, which aperture of 16mm, and which shape 2/3" chip).
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#3 David Bradley

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Posted 04 April 2007 - 08:14 AM

Thanks Micheal. I should have phrased the question better I suppose. Director wanted I POV using a 2/3" CCD 16:9 and I wanted to be sure I could find a relatively objective focal length before photography commences.
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#4 Michael Nash

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Posted 04 April 2007 - 03:39 PM

Unless you're renting HD primes, a good SD zoom should give you the focal lengths you need. For your purposes I would pick a wide zoom, like a 5.5 or so.
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