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post #1 of 22 Old 03-07-08, 07:20 PM Thread Starter
 
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confused about 2:35:1 screen

Does a person have to have a anamorphic lens to use a 2.35 size screen?And what are the benefits of this shape?
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post #2 of 22 Old 03-07-08, 07:23 PM
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Re: confused about 2:35:1 screen

Hey RB,

Your better off asking this particualr question in the anamorphic section.....
Here is the link:

http://www.hometheatershack.com/foru...ic-projection/
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post #3 of 22 Old 03-07-08, 07:57 PM
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Re: confused about 2:35:1 screen

Thread moved to Anamorphic Projection.




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post #4 of 22 Old 03-08-08, 05:58 PM
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Re: confused about 2:35:1 screen

Quote:
record_breaker wrote: View Post
Does a person have to have a anamorphic lens to use a 2.35 size screen?And what are the benefits of this shape?
You can fill a 2.35:1 screen by just zooming the lens on the projector...But you will have to change the zoom and the focus and the positioning for all the other aspect ratio's..

One of the advantages of the anamorphic lens with a constant image height screen is that you don't have to change any of these settings for most AR's..
The 2.35:1 image fills the screen, and the other AR's remain at the same height, with black bars at the sides..
But the main advantage is that you are getting full pixel mapping with the 2.35:1 image, unlike the zooming method..

I hope that helps to clear things up for you..

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post #5 of 22 Old 03-08-08, 06:51 PM Thread Starter
 
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Re: confused about 2:35:1 screen

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Prof. wrote: View Post
You can fill a 2.35:1 screen by just zooming the lens on the projector...But you will have to change the zoom and the focus and the positioning for all the other aspect ratio's..

One of the advantages of the anamorphic lens with a constant image height screen is that you don't have to change any of these settings for most AR's..
The 2.35:1 image fills the screen, and the other AR's remain at the same height, with black bars at the sides..
But the main advantage is that you are getting full pixel mapping with the 2.35:1 image, unlike the zooming method..

I hope that helps to clear things up for you..
OK see if I understand this I can build a screen specifically for athe 2:35:1 image and use my Zoom to fill up the screen vertically but I'll lose a little picture on the width?
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post #6 of 22 Old 03-08-08, 09:18 PM
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Re: confused about 2:35:1 screen

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OK see if I understand this I can build a screen specifically for athe 2:35:1 image and use my Zoom to fill up the screen vertically but I'll lose a little picture on the width?
When you zoom onto a Scope screen, your width will remain full, but you will lose 25% (approx) of the vertical rez due to the black bars that you are now projecting off the top and bottom. Another thing to consider is that as you zoom, your pixels become larger in both H and V directions, where using an anamorphic lens only expands the pixels horizintally...

The anamorphic Lens allows you to use 100% of the panel, so full vertical rez all the time...

Mark
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post #7 of 22 Old 03-09-08, 03:28 AM
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Re: confused about 2:35:1 screen

But you need a dedicated video processor to allow this?


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post #8 of 22 Old 03-09-08, 04:22 AM
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Re: confused about 2:35:1 screen

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atledreier wrote: View Post
But you need a dedicated video processor to allow this?
No. Many projectors manufactures are now allowing the needed scaling to be done from simple Plug and Play systems. Some of these are SONY, BenQ and JVC...

Mark
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post #9 of 22 Old 03-09-08, 06:37 PM
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Re: confused about 2:35:1 screen

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Mark Techer wrote: View Post
No. Many projectors manufactures are now allowing the needed scaling to be done from simple Plug and Play systems. Some of these are SONY, BenQ and JVC...

Mark
And Optoma...my next choice!

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post #10 of 22 Old 03-09-08, 07:57 PM
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Re: confused about 2:35:1 screen

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Prof. wrote: View Post
And Optoma...my next choice!
And I am tossing between the SONY VW60 or the BenqW5000.

So long as it can do 1080/24 and scale for CIH, nothing else really matters...

Mark
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