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1080p on 8 meter screen

Started Nov 25, 2020 | Discussions thread
threed123
threed123 Senior Member • Posts: 1,490
Re: 1080p on 8 meter screen--you can do it!

rablaw 3d wrote:

I am a bit confused.. which mode is better? Passive or Active (with active glasses)?

My experience is that active is better. I have watched both and passive tends to have some crosstalk if you tilt your eyes. That is with polarized passive. I have no experience with the Dolby 3D system, but I hear there is little crosstalk.

I have an Optoma UHD52ALV 4K projector and watch bluray 1080p frame-packed 3D with DLP glasses. There are two types of active glasses. Ones that use an RF signal to open and close each eye and the DLP type, which depends on a flash of light to tell the glasses to open and close. I get absolutely no crosstalk. I will say, though, that I have a high-gain 160" diagonal screen that gives me, where I sit, about a 1.8 image light gain, and it's just enough light for that screen (this screen is no longer made, however). If you are looking at getting a 1 gain huge screen, you are going to need a lot more lumens, probably 5,000 if you want to use a single projector for 3D. Both active glass types reduce the image light by almost half.

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