Archived posting to the Leica Users Group, 2009/01/18
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]> > On Jan 18, 2009, at 6:36 AM, Seth Rosner wrote:>>> All different optical > designs. All are Gauss derivatives. #1 is an 8->> element, #2 and 3 are > 6-element with slight differences (in #2 the>> second and third elements > are cemented together whereas in #3 they>> are separated by air, sometimes > called an "air lens" for the>> different refracting effect of air > vis-a-vis glass, and #4,>> frequently referred to as the "pre-aspheric", > is 7-element with>> elements 2 & 3 and elements 6 & 7 cemented together.>> > some love especially #4, calling it the bokeh king. I have the fourth design Summacron in 35mm. It is very compact, sharp and well built. Three good reasons to buy one if you can find it. Mine was made in Canda. Greg Lorenzo Calgary, Canada _________________________________________________________________ Windows Live? Hotmail?: Chat. Store. Share. Do more with mail. http://windowslive.com/explore?ocid=TXT_TAGLM_WL_t1_hm_justgotbetter_explore_012009