AVS Forum Special Member
Join Date: Aug 2005
Location: Brisbane, Australia
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As far as I know, the 480 has improved optic coatings over the 380. The prisms of the 480 should be the same as those used in the 380.
As for zooming over the use of an A-Lens -
A-Lens allows 1920 x 1080 pixels to be be used or over 2M pixels on screen to make up your image.
Zooming uses 1920 x 810 pixels or about 1.5M pixels on screen. These pixels are also 33% taller than the pixels of the same 1080 projector using an A-Lens.
I love my Constant Image Height system!