Test of TripleHead2Go and 3 projectors

[NicD]

I posted this over on the FDS forum after some discussion with the folks there. Pics and a video of my tests are here: http://www.insitesolutions.com.au/73...ls_testing.htm

[Matt Olieman]

Yeah, that's quite impressive... after looking at that, it certainly got my wheels turning in my head.

Nic, are you getting about 120 degrees with that setup? With the prices of projectors coming down, you can get three for the price of one I paid for.

Thanks for sharing Nic

[NicD]

Hi Matt - when the view is pulled back to 0.31 zoom I estimate a view range of about 130 - 140 degrees.

[W9XE/Project777]

Nic

Checked out the pictures and the video. Sure wish I could use projectors in my project. The turn gave you a good feel of motion.

Well done

[737NUT]

Looks great but one thing bothers me.

Please don't take this the wrong way but either your camera is amazing or the video was edited. There is NO WAY 3 pj's running and everything but the screen remains perfectly black! My one PJ emits enough light to make my 10x20 garage look like daytime! So either your camera is deceiving us by not showing the true picture or you have 3 pjs doing something scientifically impossible.

[NicD]

Well it ain't the camera - that was shot on a tiny Canon digital camera (not even a handycam). And it wasn't the editing coz there was none - just an AVI imported into Windows MovieMaker and exported to WMV.

Keep in mind that the 3 projected images were not large (about 1m wide each) and tightly focussed. Altho - last week I used one projector on a whole wall (to watch a movie) and that didn't light up the room either.

I am yet to see the light-spill and washout from multiple projectors that others have referred to. Maybe these BenQ projectors have made something scientifically possible?

[737NUT]

Please explain to me how a light emitting device bouncing off a reflective material doesn't light up objects in the same room. If what you are saying is true, BenQ's would be the only pj's being bought. Sorry, i have seen them in person as well. ALL projectors throw excess light. There is NO WAY your room is staying jet black dark everywhere but the actual screen. Well i take that back, if the pj's are only 3' from a screen and mounted in the middle of a gym, maybe then, but i bet you still wouldn't need a flashlight to get around like what your video portrays. Take a look at my website showing my single pj set-up with th elamp in Low/Econo mode. Maybe i need more details about the room you are using the BQ's in. Light absorbing paint, furniture, oxygen. )

[737NUT]

Trying to find the sight that shows 3 projectors in a sim room, the room looks like daytime all the time inside. There actually several sim pics out there with pj's ALL showing lots of reflected light.

[Matt Olieman]

There is screen material that is darkened, but reflects light directly from the pj. It uses glass beeds or something like that.... VERY EXPENSIVE, light bounces back to (in our case) the cockpit. It supposedly 3X brighter then a plain white surface.

Last time I looked the material was around $8 USD a square foot.

[737NUT]

I think i know whats going on, I tried a pic with my camera focused only on the screen and it made it look artificially black around it. Probably because the screen is so bright. I bet if you took a pic from the side, we would see what i'm talking about. The ONLY way to eliminate this light bleeding/spreading, is to rear project from an enclosed area seperate from where the viewer is. It's simple physics, **** even your little TV lights up a room from total darkness, now throw the switch on 3pjs at 2500 lumens, YIKES.