Archived posting to the Leica Users Group, 2007/12/02
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]At 10:14 PM 12/1/2007, Jerry Lehrer wrote: >Marc, > >I've had and used a few 50mm Xenons over the years. The best of them >being in a Retina IIIc which I got for swapping a Topaz >Filtered power supply. Using Plus X and Panatomic X. I would get >critically sharp 8x10s. at wide open or f2.8.. The worst Xenon >I used was in a Leica SM on my IIIa. It did not suffer from flare, it >was just unsharp. When I put a Summarit on it (supposedly >a coated Xenon). it was excellent wide open on Isopan F. Jerry The 1.5/5cm Xenon, the 1.5/5cm Summarit, and the first version of the 1.4/50 Summilux were identical optically. The Xenon was uncoated and the later lenses were coated. The design was a co?peration between JSK, TTH, and Leitz, and all three shared ownership of the patent. Marc msmall@aya.yale.edu Cha robh b?s fir gun ghr?s fir!