Thanks for the information. I'm going to make friends with a machinist and see what we can do. I'll post scanned images as they become available. Keep an eye on www.netinfoandmore.com/Camera for pictures and building info as I do it. Michael Hendrickson>"
Sounds like you have a telephoto converter attachment screwed onto the back of the lens to convert its focal length to the longer one. You mention that when you unscrew this section the lens focuses at its rated 190mm; with the section screwed on the focal length more than doubles. I know that this sort of thing was made some time ago; Bausch and Lomb made one early in the 1900s, and it was adjustable. But you rarely see these anywhere for sale and they're barely mentioned. Also I've seen mentioned, in literature from about the 1940s, accessory clip-on or screw-on lenses to modify focal lengths of view lenses. (In actual fact, I mis-spoke: If it were a telephoto converter per se, it would make the projected image larger, as though it were shot with a very long lens, without moving the focal plane that far away from the lens. This sounds like a focal length doubler or something of the sort.) I'd like to know how it stacks up on the negative, what its optical quality is. Sounds like a keeper to me! Good luck! 'Bye for now, --Michael _______________________________________________ Cameramakers mailing list [EMAIL PROTECTED] http://rmp.opusis.com/mailman/listinfo/cameramakers _______________________________________________ Cameramakers mailing list [EMAIL PROTECTED] http://rmp.opusis.com/mailman/listinfo/cameramakers
