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Topic: A projector for large installation with short distance to the screen
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Joined: Aug 8, 2012
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Dear friends,

Sorry for an urgent request but I need an advice:
does any of you know a video projector which can create a large size image (approximately 2.4m (±94.5 inches) x 4.4m (±173inchs)) from a really short distance to the screen?

something like this projector
http://www.peterwelz.com/images/16-welz-07a.jpg
http://www.peterwelz.com/16.html

may be you can recognize this projector's model? that will be wonderful!

I'm doing a project where 4 projections have to be included into pentagon-shape structure (the 5th wall is not active)

And projectors should be as close to those 4.5m screens as possible to avoid shadows of the audience.
I heard that using a wide angle lens on the projector will create distortions. So I don't know what could be a solution and will welcome any suggestions or advices!

With warm regards,
Masha
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Joined: Mar 28, 2005
Posts: 13,184
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They have short throw and ultra short throw projectors. Your screen size is going to be a factor if you can't properly control the light in the room. It's going to be a HUGE factor!

You can search for short throw projectors here:
http://www.projectorcentral.com/projectors.cfm?g=1&hide=0&st=1&mfg=&p=100&p=6000&w=&r=&br=&ll=&t=&db=&dt=&c=&ar=Wide+%2816%3A9-10%29&dvi=&sp=14&pjl=&pjw=&pjh=&td=&i=d&is=&sort=brt&sz=15

Something like this:
http://www.projectorcentral.com/Optoma-TW675UST-3D.htm

Sounds good, but if you look at the image size, it can only do a screen diagonal of up to 103". This is well under the size you are looking for.

Something like this:
http://www.projectorcentral.com/Optoma-TW610ST.htm

Can do up to a 200+" diagonal and still remain in focus (not very bright though at that size!)

173" width is 108" tall with that projector (have to work with real aspect ratios), so you will have to crop the media approriately.

The projector will be 7 feet 6" from the screen at that size.

It claims 24 lumens per square foot, which is about 1/3 of what is recommended for a normally lit room. So, the room MUST be dim for best results.

Projection calculator here:
http://www.projectorcentral.com/Optoma-TW610ST-projection-calculator-pro.htm
AV Integrated - Theater, whole house audio, and technology consultation during the build and installation process in the Washington, DC metropolitan area.
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Joined: Oct 27, 2011
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also you need to control the image size from overshoot and position problems try Pixelwarp keystone.

Regards chris
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Joined: Aug 8, 2012
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Quote (Pixelwix on Aug 13, 2012 11:57 AM):
also you need to control the image size from overshoot and position problems try Pixelwarp keystone.

Regards chris





Thank you so much for your help and advices! Hopefully it will work out.
Best
Masha