A TV expert of my clientele looked into the Trouble, and that is what he says:
The keystone correction on Led-96 is performed by means of a turning mirror;
1. The physical dimensions of Led-96’s matrix are large. Hence the physical dimensions of the lens are large;
2. After the mirror, driven by the keystone correction key, turns to correct the trapezoid, the lower third of the image gets out of focus of the huge-size lens, and becomes blurred and illegible. Actually, because of the huge-size lens, the whole image is blurred in the periphery (top, sides, lower part), but the lower part is blurred the most.
3. The image brightness, which is declared to be 5500 lumens with LED 96, is just a half or a third of 2700-ansi-lumen BenQ MS513’s brightness. Supposing that LED 96’s brightness in ANSI is 2800 ANSI lumens, we must have almost the same brightness, as of BenQ’s. But it is not the case. It is just a THIRD of BenQ MS513’s, maybe, a FOURTH of BenQ MS513's.
So, I’ve got three ways to live with it:
1. Forgo the keystone correction, buy and always tote with me a tripod at least 1.5 meters high so that the projector always beams perpendicularly towards the screen. In this case, the tripod with the projector obscures the view to those students who seat behind me. This is an unacceptable solution.
2. Project from the desk and put up with the trapezoid and the dim image. It is bad when I present figures, and it is too bad when I display a footage / movie.
3. Leave the projector home, fix it on the wall at 1.5 meters, and try to watch films. Hardly possible: I will always have to crane my neck and throw back my head to be able to see the dim image located in the middle of the wall. Nice Having Rest!
And now I am looking for a new projector for both my job and home, without the spoilage or without the cheat.
LED 96 does devour 230 watt. Where is the brightness? Who can tell? Maybe LED 96’s brightness is lost in the L-shape corridor between the matrix and the lens, with the mirror in the angle. This corridor is not an optic fibre, is it? Maybe the wise guys who designed it think otherwise.
LED 96’s resolution is really WXGA (1280 x 768), whereas BenQ MS513’s resolution is 800 x 600. And where is LED 96’s resolution? Devoured by the blur because of the huge lens?
And to top it, the manufacturers of LED 96 gratify the Purchaser with their illegible and illiterate, to say the least, “User’s Manual”, howlers all along like: “(bullet) About Open and close the projector (bullet) when close the projector…” In order to improve the projector service life, It shouldnot place in a wet and ventilation condition”. Or “(bullet) when close the projector ,donot pull out the power cable directly .After 5minutes, the projector will shut off automatically.” Or "2) High-feet adjustment" It's about the adjustment screw. Or "3) The sharpness of the screen might be interrupted when ..." Illegible illiterate nonsense. The authors of the manual do not even know where to put the blank: before the comma, or after the comma!
Poor blind dim device, poor illegible illiterate Manual!
