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Re: Video projector suitable for outdoor useIt was noted in the OP that the throw is around 40'. A 40' throw for a 60"x80" or 49"x87" image, which are the 4:3 format and 16:9 format versions of 100" diagonal, would require a long throw lens (and apparently the Viewsonic projector noted would not work). While image brightness is not directly related to throw distance, the long throw lens would also likely have greater losses in the optics and add to the cost. It still really comes down to being able to limit the ambient light on the screen. especially for front projection.
Re: Video projector suitable for outdoor use
It was noted in the OP that the throw is around 40'. A 40' throw for a 60"x80" or 49"x87" image, which are the 4:3 format and 16:9 format versions of 100" diagonal, would require a long throw lens (and apparently the Viewsonic projector noted would not work). While image brightness is not directly related to throw distance, the long throw lens would also likely have greater losses in the optics and add to the cost. It still really comes down to being able to limit the ambient light on the screen. especially for front projection.
