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Panavision Equivalent Focal Lengths Tool


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#1 Martin Yernazian

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Posted 26 May 2007 - 07:16 PM

I have no idea how to use it, not becuase I don't understand a concept, is just my english , I don't get the last 3 enterings ( like how I found out what is the Starting focal length? or the Highest?)
and also Dimension to use in the Calculation.

http://www.panavisio...lenseqvform.asp

Thanks guys, please help?

ps: I just want to check a 24mm, 50mm, 100mm and a 8 and a 9mm for Super 16, using 35mm still lenses


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#2 Brian Drysdale

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Posted 27 May 2007 - 04:30 AM

If you're using 35mm stills lenses on Super 16, the angle of view on Super 16 stays the same as the Super 16 lens of the same focal length. So a 24mm stills lens will have the same angle of view as a 24mm Super 16 lens when you're shooting Super 16.

The Panavision calculator gives you the equivalent focal lengths, that is the lens focal lengths being used on different formats that give the same angles of view.

So, if you wish to find out how the angle of view of Super 16 lenses compared to 35mm still lenses, you select Super 16 as the "first Format", then 35mm Still as "Fomat". You then enter the shortest Super 16 focal length you wish to consider, followed by the "Increments" - the gap between the lens you want to be compared e.g. every 5mm. Following that, you enter the highest super 16 lens you want. You hit the calculate button anf you get a table covering the selected range.

You can work in either direction between the formats and between numerous different formats.

Edited by Brian Drysdale, 27 May 2007 - 04:32 AM.

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#3 Martin Yernazian

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Posted 27 May 2007 - 12:48 PM

thanks Bryan I guess my question will be:
what is the 35mm still lens equivalent for a 24mm lens on Super 16?
and so forth how can we calculate this same equivalent with other lenses?


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#4 Brian Drysdale

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Posted 27 May 2007 - 01:23 PM

Shooting with a 24mm lens on Super 16 would be the equivalent to using a 64mm lens on 35mm still.

You just follow the procedure I outlined, beginning with your widest lens, you can put in the next lens in your set as the highest and the difference as the Increment. You can then work through all your lenses.

The alternative is to starting focal length at say 5mm and put an Increment of perhaps 5mm and go up to 120mm as your highest. You'll get pretty good range of lenses listed.
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#5 Martin Yernazian

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Posted 27 May 2007 - 02:49 PM

64mm? I thought it was close to 50mm
how you came to this conclusion?


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#6 Martin Yernazian

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Posted 27 May 2007 - 02:53 PM

don't answer that I get now... is so stupid thanks man


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#7 Chris Keth

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Posted 27 May 2007 - 03:12 PM

You do know you can just figure out equivalent focal length with ratios and a bit of math, right? You just set it up like this:

focal length on 35/diagonal of 35 neg=focal length on other format/diagonal of other format

You can obviously alter the diagonal part to compare horizontal angle of view, too.
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