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Posted

With the imminent sporting events coming up that happen to clash with sunny days, and having young family and not wanting to go to the pub I was wondering if anyone has had success with setting up a projector outside. Projector is fairly decent 4000lm and was thinking of putting it under a gazebo to block it from direct light.

 

I can also set it up as rear projection. Would it helpful if I put the projector under a sheet and draped the sheet up to the screen so blocking out any light from the projecter to the back of screen.....or is my science wrong with that theory?

 

Anyone done anything simliar with success?

Posted

I've always advised that it won't work satisfactorily...

 

As it's in your garden your definition of satisfactory will probably be lower than the school: "we want to put a live feed of sports day up for parents but we want to use a 2000lm classroom projector onto a sheet on the brightest day of the year."

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Posted

4,000 is nowhere near enough.

 

For comparison, I did a mass in a large corridor, approx 100m long by 15m. We had a large rear project fastfold and draped the area around the screen as you described, and a 7k projector. Throw distance was approx 3m, using ultra short throw lenses... We couldn't even see the menu, so hired in 2 x 12k's and that was useable. Just.

 

I think you'd be better off with a large screen telly on a table if I'm honest...

Posted
Our hall projector is 8500 lumens and depending whether I put it on the front or back screen (adjusting pan/tilt/zoom accordingly) it's hard to see even with the lights on dim; putting it outside would have no chance.
Posted
So this is a unanimous no then :).....better cancel the invitations and take the beers back to shop. Cheers for the advice.
Posted
Our hall projector is 8500 lumens and depending whether I put it on the front or back screen (adjusting pan/tilt/zoom accordingly) it's hard to see even with the lights on dim; putting it outside would have no chance.

That's bad - 8.5k front projecting should be fairly good? Our laser projector is 8k and more than enough in fairly bright spaces? Time for a new lamp?

Posted

Googling how many lumen's is the sun brings up some interesting answers. That's what you're competing with unfortunately.

 

Ask a friendly manufacturer for an evaluation of an 86" 4K screen for the weekend.

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  • 2 weeks later...
Posted

Probably a bit late now but I think it's possible. We regularly used a 7000 lumen projector in a hall with no blackout, rear projecting on to a 12' screen. Worked fine even on really bright sunny days with the sun streaming in the huge windows.

The key for rear projection is to keep any ambient light from hitting the back of the screen. Basically build a light-proof tunnel between the projector and the screen. If you keep the screen size sensible (maybe under 6' diagonal) you should be able to get decent results.

Ambient light from out front goes through the screen rather than washing it out so it doesn't affect the image nearly as much as with front projection. Don't even think about front projection though - no point whatsoever in trying that outdoors in daylight.

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