21 apr 2007 kl. 00.30 skrev Don Roberts:
Having worked with engraving cameras, and looking at this mount, I would not be surprised if that was it's intended use.
Would it really have that iris diaphragm if intended for high- resolution copy work of flat subjects? As wide as possible (and corrected for that) is the usual recipe for max resolution, just like astronomical optics.
OTOH, the absence of a shutter hints that exposure was regulated by controlled lighting instead (or manually with a lenscap for a really old lens, or a pinhole).
Per Öfverbeck http://ofverbeck.se "In a world without walls or fences, who needs Windows or Gates?"
