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Message |
Edward
Guest
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 Posted:
Wed Nov 03, 2004 2:03 pm Post subject:
Rosco Screen and Rear projector question |
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Hi,
We need some advice from you guys. We are planning to use a rear
projector to project some clips on a rosco screen. The environment is
in a community center where sunlight can enter the windows but not hit
on the screen directly. The brightness level of the surrounding area
is about 40 incident light (foot - candles).
Our budget is very limited, we are planning to use a 2000 lumen
DLP/LCD rear projector to project an image on a 7' x 9' rosco screen.
We don't have experience on it and we cannot afford to buy a high end
projector. Is 2000 lumen project bright enough? If not, we are
planning to cover the path between the projector and the screen with
black board and try to mininize the sunlight issue. Is it feasible?
If it is still not good enough, can you please give us some advice?
What type of rosco screen should we use?
Thank you very much.
Edward
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David Marks
Guest
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| Posted:
Thu Nov 04, 2004 1:29 am Post subject:
Re: Rosco Screen and Rear projector question |
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Edward wrote:
| Quote: | We are planning to use a rear
projector to project some clips on a rosco screen. The environment is
in a community center where sunlight can enter the windows but not hit
on the screen directly. The brightness level of the surrounding area
is about 40 incident light (foot - candles).
Our budget is very limited, we are planning to use a 2000 lumen
DLP/LCD rear projector to project an image on a 7' x 9' rosco screen.
|
Ok, give us some more info. Define Rosco screen.
You would be far better off with a "real" rear projection screen
from Da Lite, Stewart, or Draper. These screens are
readily available from AV rental houses and and aren't
that expensive to rent.
40 foot candles is pretty bright. You are correct in
thinking that blocking light off the back of the screen will help.
By the way, it's not a DLP/LCD projector. 2 entirely different
animals. It's probably LCD. If it were DLP it would be much
more expensive and you wouldn't be as worried since DLP
projectors have a much higher contrast ratio than a LCD
projector.
IF YOU'RE careful, 2000 lumens may do the job. Ambient
light will determine how sucessful you are. |
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Mike Kujbida
Guest
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| Posted:
Thu Nov 04, 2004 4:38 am Post subject:
Re: Rosco Screen and Rear projector question |
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David Marks wrote:
| Quote: | Edward wrote:
We are planning to use a rear
projector to project some clips on a rosco screen. The environment
is in a community center where sunlight can enter the windows but
not hit on the screen directly. The brightness level of the
surrounding area is about 40 incident light (foot - candles).
Our budget is very limited, we are planning to use a 2000 lumen
DLP/LCD rear projector to project an image on a 7' x 9' rosco screen.
Ok, give us some more info. Define Rosco screen.
|
http://www.rosco.com/us/screens/roscoscreen.asp
I've used the twin white myself in a TV studio for various projects but
would NOT recommend it for rear projection applications because, in my
opinion, there would be too much light loss through it.
I definitely agree with David's suggestion about a "real" screen.
Mike
| Quote: | You would be far better off with a "real" rear projection screen
from Da Lite, Stewart, or Draper. These screens are
readily available from AV rental houses and and aren't
that expensive to rent.
40 foot candles is pretty bright. You are correct in
thinking that blocking light off the back of the screen will help.
By the way, it's not a DLP/LCD projector. 2 entirely different
animals. It's probably LCD. If it were DLP it would be much
more expensive and you wouldn't be as worried since DLP
projectors have a much higher contrast ratio than a LCD
projector.
IF YOU'RE careful, 2000 lumens may do the job. Ambient
light will determine how sucessful you are. |
|
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