I haven't seen a design where the tempered glass goes before the condenser. I'll have to look into that.Originally Posted by tracydani
When you mount the projector on the ceiling or floor and the image projected will no longer be perpendicular to the screen or wall and the top or bottom of the image will be narrower. Keystoning is when you tilt the collector fresnel to compensate for the angle. Otherwise the projector must remain perpendicular to the wall or screen. Tilting the 2nd fresnel is easy enough but making an external adjustment control mechanism seems like a lot of work (without suffering light leakage).
BTW, the IKEA napkin holder looks pretty coolbut I'm thinking about this because I want a bigger bowl:
Large Parabolic Reflectors @ 12", 18", and 24" from Edmund Optics
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