Archived posting to the Leica Users Group, 1998/02/19
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]At 09:15 PM 19-02-98 +0100, you wrote: > >The M6 "Ein Stuck Leica" (ESL) site links to the current 1.4/35 >asph Summilux at > ><http://www.leica-camera.com/m_system/mobj_d.htm>. > >In this lens, which ever it may be, both, the front and the rear >lens, are more thick in the center than at the edges. > >This lens looks completely different than the 1.4/35 asph >on the (my) M6-ESL. > >In the 1.4/35 asph Summilux from the M6-ESL both, the front >and the rear lens, are more small in the center (several mm) >than at the edges. I'm sure, because she's lying in front >of me. The aperture ring is curled. And the lens inscript >does not allow the complete word "aspeheric", because the >engraving of "Ein Stuck Leica" does not leave enough space. > >If a concave lens is smaller in the center than at the edges, >then the M6-ESL's Summilux is the aspheric version with two >concave lenses. Both versions of the aspheric lenses have concave front elements (in the sence that you describe, the front element dips inwards, rather than out). The cross-sectional diagrams are at first glance similar in appearance. Dan C.