I've seen these in the catalogs (Da-Lite dual vision etc) and may have used one once a long time ago but don't really have enough experience with them to have an opinion. So, I'm looking for opinions.
Obviously, the "gain" is going to be low compared to a dedicated front or rear on account of the surface reflecting and transmitting light at the same time. But I've learned that contrast ratio is mostly what matters when it comes to readability etc. The human eye is incredibly flexible and "trickable" when it comes to actual brightness. Plus, the Da-Lite brand surface claims a quite wide angle which is nice for real meeting rooms and also helps with avoiding hot spotting in rear projection.
btw this is in reference to portable event staging like for corporate events.
Obviously, the "gain" is going to be low compared to a dedicated front or rear on account of the surface reflecting and transmitting light at the same time. But I've learned that contrast ratio is mostly what matters when it comes to readability etc. The human eye is incredibly flexible and "trickable" when it comes to actual brightness. Plus, the Da-Lite brand surface claims a quite wide angle which is nice for real meeting rooms and also helps with avoiding hot spotting in rear projection.
btw this is in reference to portable event staging like for corporate events.
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