outdoor projection

[komart663]

hi all !i'm actually working with a theater company on a show on a moving truck.My problem is that we have to perform in cities with urban light,i made a black room between the beamer and the screen,it does 3 meters long,the screen is 2m*2m,how powered must be my beamer ?
regards
komart

[vjrei]

No less than 2200 lumes and I may be very short.

Be sure to use the actual capacity of the projector without abusing from the brightness control because if the projector power is not enough and you use the brightness all the way up it may burn the images.

I think the right thing would be to use a 3000 lumens at list, I have no too much experience seting up projectors outdoors but I think 3000 would do.

[mondo]

be careful here
we fell foul of 3000 lumen projectors that were not punchy enough for urban vjing and got shaken to bits on teh move

hire a stronger projector for good measure - but then you will have a distance to screen problem - lenses arent cheap either

i recommend you speak very closely to the projector hire company and discuss exactly what you are trying to achieve - sometimes they require their own technicians with the projector too especially in moving truck situations

good luck

[dronkie]

I just want to warn the people who think that you will get a better result by always hiring a stronger projector.
If you don't have a good screen, even a Barco 8000 lumen or higher won't get you out of the shit you're in. So if you're using front projection : forget it. Even an 18000 lumen R18 can't project 'black', so you'll NEVER have contrast in you're image. Trust me ... Been there, done that. You'll have to wait 'till it gets dark and by then people are really pissed if you didn't warn them ... If you're using retroscreens from the 'da-lite' type : things get a little bit better. But still it looks like shit and most of the time you won't see anything. If the sun hits you're screen : nothing is visible anymore.
If you really really want to have outdoor projector, it's better to have a look at screens like those from DNP, or the so-called 'Magic Daylight screens'. These are screens with a very high 'return'. If you consider that a retro-screens from da-lite has a factor of 1:1 (something like that), you must know that screens like 'magic Daylight' have a gain of 7:1. I've tested it outside in daylight, and if you're asking me, it's the only good solution besides LED-wall...
But of course : there are some disadvantages. Okay, it's cheaper than the 20000 Euros you have to pay per square meter of Barco LED (yep ...), but a 'Magic Daylight screen' s still costly. I mean : if you take the biggest type available (+/- 2mx2.68m) you are lokking at a price of around 1600 ?. So if you really need it : this is a good price.
Another disadvanteg is the fact that these screens are not flexible. they are made out of rigid PVC or acryl or something... So that's rather shitty : they are very breakable too. But trust me : the result is there too. here are some links :
http://www.media-vision.de/international/index3.html
http://www.en.dnp.dk/get/2821.html

and remember : don't think a 5000 lumen will help you if the conditions are not good. Forget it ... With a good screen you will get further, and a 3000 will do ...

Greets...

The Dronkster

[zap25]

Right, outdoor projection in daylight conditions is virtually impossible. You're fighting the biggest projector out there, the sun.
Front or rear projection, it doesn't really matter. Even when your screen is on a stage with a roof that takes away direct sunlight, indirect sunlight can still screw it up.

There's simply no contrast. No projector can make "dark" pixels.