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Author Topic: Aspect Ratio, Screen Size...  (Read 4230 times)

Kellen Tyburski

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Aspect Ratio, Screen Size...
« on: October 07, 2009, 04:49:15 pm »

Hey guys...

I usually frequent the REP forums, but I had a question that I think would be best answered over in these parts... I am an AV technician at a hotel, and I have always been a little cloudy on my projection chops - I often just throw up projectors and wing it... Wondering if you guys could help me clear up a few things, or point me in the right direction.


(Lens size) * (screen width) = projector distance away from screen

So if its a .8 lens * 10ft = 8ft away (ideal distance)?


Is this true?
Also... Here is a question I have been wondering.

How is my 9x12 Fast fold screen's dimensions directly related to a certain aspect ratio? Is a 9x12 screen "tailored" for a certain aspect ratio?

Can you guys recommend any good AV books that cover this stuff? I am graduating with a degree in Audio Engineering, and unfortunately we have not covered any of this in school. I want to be just as knowledgeable with projection as I am with Audio signal flow.  

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Mac Kerr

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Posting rules
« Reply #1 on: October 07, 2009, 10:02:41 pm »

The posting rules clearly displayed at the top of the page require that your real name be displayed. Unlike R/E/P aliases are not allowed in these forums.

Please go to your profile and change the "alias" field to your real name.

Mac
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Kellen Tyburski

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Re: Aspect Ratio, Screen Size...
« Reply #2 on: October 09, 2009, 04:35:20 pm »

Ok, I did the deed. Sorry I missed that!  

Can anybody shine some light on this for me?

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Brian Kent Tennyson

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Re: Aspect Ratio, Screen Size...
« Reply #3 on: October 11, 2009, 06:54:14 pm »

you are correct on the lens throw distance.

Your 9' by 12' screen is a 4:3 screen and if you fill it by the width with a 16:9 image the image will be 6' 9" by 12' (aprox).

Best place to learn about projection is on the Da-Lite education site. Tons of great info. http://www.da-lite.com/education/
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