I'm now getting around to examining an eBay purchase from a while ago. I'm guessing it probably came out of a process camera of some sort. It's a tiny 8" f11 fixed aperture. The threaded flange is aluminum but the rest looks like brass. I unscrewed the front cell to confirm that it is a two-element, presumably Artar design. The rear group is accessed by unscrewing a retaining ring at the rear with a pin spanner. The rear group is pretty firmly set in place so I haven't tried to remove it, but it's a very thick, cemented construction. The rear surface is plano so it's not a Dagor design but I don't know what it is. A LED test reveals four reflections, equally bright, of which three move in the same direction. Does anybody know more of this lens or its original application?
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