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1:2.0 Super 35 groundglass


Tammo van Hoorn

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Hi

 

I'm prepping a job this week where i've been asked by the DP to prepare an unusual aspect ratio. We're shooting super 35 and he wants a 1:2.0 groundglass. The suggestion would be to get a 1:1.85 super 35 groundglass and 'pencil' in the 1:2.0 aspect. Any suggestions as how I could work out the measurements for the pencilled in aspect ratio in relation to the 1:1.85 groundglass?

 

Many thanks

 

Tammo van Hoorn

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Hi

 

I'm prepping a job this week where i've been asked by the DP to prepare an unusual aspect ratio. We're shooting super 35 and he wants a 1:2.0 groundglass. The suggestion would be to get a 1:1.85 super 35 groundglass and 'pencil' in the 1:2.0 aspect. Any suggestions as how I could work out the measurements for the pencilled in aspect ratio in relation to the 1:1.85 groundglass?

 

Many thanks

 

Tammo van Hoorn

 

 

Hi,

 

24mmx12mm will be S35 1:2.0

 

24mmx12.97mm is S35 1:1.185

 

So Basically a line 0.5mm inside the 1:185 on top and bottom.

 

Cheers,

 

Stephen

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Hi Stephen

 

Fantastic! Thankyou very much. If you don't mind me asking, where did you find these measurements? Is it an aspect ratio you have used before or just a simple relative mathematical relationship you've worked out.

 

Many thanks again

 

Tammo van Hoorn

 

PS Edit: Sorry I wasn't thinking. Logical:

 

24mm divide by 1.85= 12.97

24mm divide by 2.0= 12

Edited by Tammo
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Hi Stephen

 

Fantastic! Thankyou very much. If you don't mind me asking, where did you find these measurements? Is it an aspect ratio you have used before or just a simple relative mathematical relationship you've worked out.

 

Many thanks again

 

Tammo van Hoorn

 

PS Edit: Sorry I wasn't thinking. Logical:

 

24mm divide by 1.85= 12.97

24mm divide by 2.0= 12

Tammo,

 

There's a great page containing links to calculators and image sizes on Panavision New Zealand's website at:

 

http://www.panavision.co.nz/Main/kbase.asp?cat=13

 

Edmond, OK

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When i have to add lines to a groundglass i add the new lines to the used groundglass in Photoshop and print this in it's original size. Then i put the groundglass on the paper with the markings on the groundglass exactly matching the lines on the print. I then stick scotchtape on the groundglass to add the new markings. This is very hard to do if you're alone so it's a good idea to have some help available. Another good idea is to shoot a frameleader after the modified groundglass is installed.

 

All the best for the shooting!

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Great! Thankyou Daniel. I've made up the groundglass now using a similar technique to yours. Having projected both the 1.85 and 2.0 g.glasses its actually come out pretty well!

 

Many thanks again for your helpful advice.

 

Tammo

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