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Aspect Ratio Chart


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#1 Kirsty Stark

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Posted 06 January 2008 - 02:44 AM

Does anyone know where to find an aspect ratio chart online?

Thanks in advance.
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#2 David Mullen ASC

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Posted 06 January 2008 - 03:09 AM

Could you be more specific? Do you just want to see a rectangular box that is 1.85 : 1 or 1.33 : 1, for example? Because it's easy to draw something exactly those proportions on a computer. Do you want to see various groundglass markings available for cameras? Do you want a list of film formats?

For example, under Configurations, you can find a chart of groundglasses, 35mm is near the bottom of the page:

http://www.arri.com/entry/products.htm
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#3 Kirsty Stark

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Posted 06 January 2008 - 04:20 AM

Thanks for the response David.

To be honest, I wasn't completely sure what I was looking for myself. A friend of mine who is starting a film tomorrow asked if I had one, and I assumed it was a compiled chart of different aspect ratios on top of each other for comparison.

I don't have one, so I thought I'd look it up and see what it was, thinking that it must be some sort of standard chart used in test shoots or at the beginning of a roll, but all I could find in a Google search were things like this:

http://www.fotokem.c...aming_chart.jpg
http://www.sci.fi/~a...reas/areas.html

If there's no standard chart, it's all good... I'll have to ask my friend what he was looking for and why.

Thanks for your help!
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#4 David Mullen ASC

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Posted 06 January 2008 - 04:47 AM

A friend of mine who is starting a film tomorrow asked if I had one, and I assumed it was a compiled chart of different aspect ratios on top of each other for comparison.


It depends on the specific film format if multiple aspect ratios share the same width but vary by height, or share the same height and vary by width, or share neither and overlay in a cross-pattern.

If you're talking about a single aspect ratio, that's just a rectangle in the proportions you need.
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#5 Mike Panczenko

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Posted 06 January 2008 - 12:34 PM

If they're starting a film tomorrow, they might be asking you if you have a chart so that they can shoot a framing leader. Arri has some of them on their website. Here's a link to a bunch of different ones: http://www.cameraser...tech/format.htm

Hope this helps!
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#6 Kirsty Stark

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Posted 06 January 2008 - 08:46 PM

Thanks Mike. I'd say that's probably what he's looking for. Much appreciated. :)
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#7 Bill DiPietra

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Posted 06 January 2008 - 09:53 PM

Thanks Mike. I'd say that's probably what he's looking for. Much appreciated. :)


Another excellent online resource regarding aspect ratios is http://www.widescreenmuseum.com

That site also explains the history of widescreen. Very informative.
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#8 Matthew Parnell

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Posted 09 January 2008 - 04:27 AM

Panavision also have downloadable aspect ratio charts in PDF format on their Australian website.
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#9 Kirsty Stark

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Posted 09 January 2008 - 08:46 AM

Thanks Bill and Matthew!

Just in case anyone else is looking for it, I found the link to the downloads section on the Panavision Australia website, which is here:

http://www.panavisio...m.au/Downloads/
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#10 John Brawley

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Posted 09 January 2008 - 04:30 PM

Thanks Bill and Matthew!

Just in case anyone else is looking for it, I found the link to the downloads section on the Panavision Australia website, which is here:

http://www.panavisio...m.au/Downloads/


Kirsty, it sounds to me like what your friend was looking for was a chart for shooting a frame and focus chart. Frame and focus leader means that the telecine operator will set up the chain to trasnfer the footage with the correct framing. It also helps them focus the chain at the beginning of the roll. The idea is that you estimate how many days you're shooting and shoot 10' for each day at the beginning and get the lab to splice the footage in at the beginning of each day's processed rushes.

Often, especially on longer running shows, the telecine doing rushes is doing lots of different jobs throughout the day and this ensures that they are transferring what you framed. You might also even have different operators on each day.

Most of the camera rental companies have free charts they will give you or you can download and print.

The far better, more accurate, and more cool way to do is to project your ground glass. In a darkened room, take a maglight and shine it back down the viewfinder. Make sure you use a longer focal length lens too (as they tend to have less distortion). On 16mm a 50mm lens is good.

It's something that requires 2 people to do, one to operate the maglight and the other to mark up the wall with some tpe, but that way youre actually getting the markings from the ground glass. It's not unsual when using the charts for the vertical and horizontal lines to not...err....line up !

jb
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#11 Dory Breaux DP

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Posted 17 January 2008 - 07:24 PM

This thread gave me an idea.
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