[SML] Masking Projector Black

[Jason Salvatori]

 I've always had issues trying this in the past.  The problem is that
in front of the lens you are already past the focal plane, so you
can't get a hard cut.  It is akin to using barn doors on a fresnel as
opposed to a shutter on an ERS.   Having your blocking material a bit
further in front of the lens does help a bit. I've also found that
doing this will lower your output intensity of the rest of the image.
What we need is someone to invent a projector with internal shutters
that are DMX controlled... Jerry?

Jason


>       I'm curious what can go wrong when trying to mask portions of a
> projector field with black wrap. I am planning to dowse the projector, but
> do to its intended use, and necessitated position, large portions of the
> field will never get used.