I guess Science is the best place for this…
I inherited some high grade optics in housings from unknown origin that were used for a project a few years ago and I have no use for them. Most are likely from a rear projection TV or something like that. One piece seems more “military” or “industrial” and has a linear focusing mechanism. There are a number of smaller unmounted glass lenses and filters as well. I hate to just scrap them, so I’ll offer them up for free to anyone who takes an interest.