Raro, raro.... en Mundodvd hablaron hace un tiempo de esta cuestión:

Cabe destacar que la estanqueidad de la lámpara es perfecta, algo en lo que Panasonic ha trabajado de lo lindo para que sea imposible que entre ni una sola mota de polvo.

http://www.****************.com/cine...t-at5000e.html



The new optical heart of the AT5000 is, crucially, built inside a sealed enclosure, which should keep the optics free of the dust problems that we’ve seen eventually blight some previous LCD models

http://www.trustedreviews.com/panaso...ojector_review



Our first question with the engineers at our recent meeting was about the dreaded dust blobs associated with LCD projectors of the past. We were told that the optical block, including the panel and lamp housing, were now well sealed and as far as Panasonic is concerned, it is dust proof so there should be no issues concerning blobs with the PT-AT5000

http://www.avforums.com/review/Panas...or-Review.html
Saludos.