hey all, you might scoff at the quality but definitely not at the price, most rear projection tvs (the giant super light weight wise, pretty dim and shitty) large screen tvs of the 80-90's have giant fresnel lenses in them, like 20x24 and you can usually find them free on the street wherever students are moving out of. Just crack the case open and the fresnel is usually behing a polarizor type filter, also the projection lenses are fairly soft super fast f1.5 lenses that cover 4x5 and luck be have it there is one for r, g and even B. I got a nice sony one from the late 90's on the side of the road, and the LOUD speaker unit on bottom is now my darkroom boombox. Enjoy
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