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Open Air TV mit Beamer und 4x3 Leinwand

Open Air TV with video projector and screen 4x3



Frage von DennisP.:
Juli 2010

Hi,

I hesitate shortly following Project:

On a free surface (; Field / meadow), I would build a 4mx3m canvas.
It is a canvas of clamping Gerriets, which is raised by a SPANNFIX 4Punkt Travers frame.
The canvas is stretched between two "Layher towers"
They are 6m high towers with a floor area of 2x2m, built of scaffolding materials that are in these are the speakers. Say PA wings, seen today next to each stage.
The canvas is now on between the two towers of height 3m clamped.
5 meters behind the screen is now a third of these towers, in which the projector is, that the canvas of irradiated now back.
The whole structure is now s.den of both sides and top of Molton completely covered so that no light shines back of the canvas. The front of the screen is now aligned with the north, that of synonymous front no light can fall on the canvas.

Now my question is, how bright the projector should be, or vice versa, rich 4500Ansi (; Sanyo PLC-XU106)
The problem to me is only this projector is available, is that enough?
Or someone knows a random address in Hamburg where "cheap" projectors to 10.000Ansi can borrow for a week.
So it comes in an open field to show films.
I hope you can help me as Ergänzugn a little drawing.

http://img821.imageshack.us/i/skizzez.jpg/



Antwort von beiti:

The crucial question is: At what time of day to take place the whole thing?

In broad daylight you have no chance. Perhaps one can dimly imagine even a picture, but enjoyable films to look it will not last. Even a 10000-ANSI-lumen projector will not change that. While the north is of no direct sunlight, but still a lot of light remitted from the atmosphere, and the viewers have to struggle even noon synonymous with back light.

In the advanced course at dusk and night, the thing looks a bit different. Then I would, however, align the canvas to the east, so just by auslklingenden daylight is not too much falls to the canvas.

Yet a little consideration, if you want to do experiments: 10,000 ANSI on 4 x 3 feet is just as bright as 2,500 ANSI to 2 x 1.5 meters.




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