Best 1080p short-throw projector?

[NedHamilton]

Both of these projectors are 760p and not 1080p projectors.

I noticed that (actually it's 720p). It's not the 1080p or 720p that you have to consider on computers but rather the resolution. Both these two projectors are lower resolution, with a native resolution of 1280x800 versus a resolution of a huge 1920 x 1080 for the W1080ST. But the W1080ST has a much higher Throw Ratio. I wonder how much difference the lower resolution makes. Will you notice the pixels??? If you use 3 projectors a Throw Ratio of .69 works fine. The need for a lower Throw Ratio is if you have a small radius screen, large angles of projection, or fewer than three projectors--in general terms. Always do the "projector math" before you buy.

[GodAtum]

I'll think I might something like this screen: http://www.immersivedisplay.co.uk/pdf/3.2m%20HSP.pdf

It has a 3.2m diameter and is 1.6m high.

[NedHamilton]

Wow, those are nice screens. They are small and they are curved vertically. With 1.6m radius you'll definitely need a short throw projector. And because of the small radius you'll need to worry about shadowing from the sim frame.

[OmniAtlas]

I'll think I might something like this screen: http://www.immersivedisplay.co.uk/pdf/3.2m%20HSP.pdf

It has a 3.2m diameter and is 1.6m high.

This other thing you might want to consider is something like the Cobra Curve Screen -- basically one projector with a 180 degree warp using first surface mirrors. The idea originated from Paul Bourkes work with the idome.

I am hoping to go this way because I want some flexibility with my system -- this will allow me to use the projector also for cinema viewing, perhaps a indoor golf system, and of course flight simulation

The Cobra is expensive, so I in the process of figuring out how to make my own screen.

[GodAtum]

immersive Displays have screens which go up to 4.5m radius but I dont have enough room.

How much is the Cobra? Looks good and small footprint but for flight simming I would use trackir as it only gives a 150 degree field of view (Cobra Simulation - Cobra Features)

[OmniAtlas]

How much is the Cobra? Looks good and small footprint but for flight simming I would use trackir as it only gives a 150 degree field of view (Cobra Simulation - Cobra Features)

Over 5000 pounds.

[GodAtum]

Over 5000 pounds.

wow, the full dome one i showed is £4000.

[NedHamilton]

The article I posted above mentions the BenW1080St would be inadequate for the job.

It would be inadequate for the 225 degree projection in the article. The original poster was going for 180 degrees which will work with TR=.69.

[OmniAtlas]

That's good to hear ned. Have you see. The videos by immersive display? They e managed to get 180 warp with 2 projectors. However it is is a GA they are flying so no shell top.

[NedHamilton]

I've seen the Immersive display videos for 3 projectors but I haven't seen the ones for two projectors. Theoretically you can do 180 degrees with 2 projectors. A throw ratio of .5 will do it but with no overlap between the two images so there won't be any edge blending. You need a lower throw ratio if you are going to blend the images (or be OK with a little less than 180 degrees)