Archived posting to the Leica Users Group, 2001/08/30
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Could someone please tell me what these lenses are good for, except the known use... a paper weight. Being computed for the x-ray spectrum, it couldn't possibly produce a usable image using the visible spectrum and film. Could it? Jim At 08:08 PM 8/30/01 -0400, Rob McElroy wrote: >Henning, > >Hmmm? Now that is curious. I own the lens and the image circle on mine >does not cover the 35mm format. The circle itself barely makes 30mm, let >alone enough room to put the whole 35mm frame in the middle with >relatively even illumination. > >When I first purchased the lens, I made some inquiries, including here on >the LUG, and found out that the Picker X-Ray 90mm f1.0 was a different >optical design than the Navy one in Lager's book - and that this probably >accounted for the smaller image circle. > >Did you have to make a custom mount to attach it to the camera? > >Leitz also made a 65mm f0.75 for Picker which has a small image circle. > >Regards, >Rob McElroy >Buffalo, NY > > >Henning Wulff wrote: > > > Yes, it covers the full frame, and it _is_ one manufactured for the > > Picker X-ray corp. > > > > Since all images are wide open (no moving parts on this lens) they > > all exhibit flare etc. in similar amounts. It results in 'flare', but > > I'm sure it is due to trying to use the usual visual spectrum, > > whereas the lens was most likely designed to use only a very narrow > > band, and not corrected for the rest. > > >Rob McElroy wrote: > > > >> Hello Henning, > >> > >> Does the 90mm f1.0 you examined cover the full 35mm frame? The > >>Leitz 90mm f1.0 manufactured for the Picker X-Ray Corp is a > >>different optical design > >> and doesn't cover 35mm. > >> > > > Did all of the wide-open images from this lens exhibit as much > >flare as the image you posted?