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Eso. Búscalo y debatimos. Porque hay cosas que no me cierran.
Zoom lens effect. The projector is at its brightest when the 1.6x zoom lens is set to its widest angle position (largest image for any given throw distance). When set to its longest throw telephoto position, lumen output is curtailed by 28%. This is in line with expectations for most 1.6x zoom lenses.

Brightness uniformity. Depending on the zoom lens position uniformity averages around 70% with the brightest portion of the image in the center to lower center of the screen. While 70% uniformity is lower than ideal, in our experience it is typical of most popular lower priced DLP home theater projectors. On a 100 IRE white pattern the image fades somewhat on the left and right edges. With active video on the screen the edge fading will not be noticed by the viewer since the video breaks up the image and the eye is focused on the action in the middle 80% of the screen anyway. But it is visible on a solid color image such as a test pattern.

¿Te vale eso? Aunque leí en otro sitio algo aún más completo sobre este tema pero... a saberse dónde está, si me topo de nuevo con ello pues ahora fijo que lo guardo y lo pego por aquí.