Archived posting to the Leica Users Group, 2001/08/30
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]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?