View Full Version : Bokeh + Zeiss C Sonnar

Ken Lee
17-Jun-2006, 06:20
Note the shape of the diaphragm: lots of blades, but not exactly round either.

See the article and illustration here:

Jason Greenberg Motamedi
17-Jun-2006, 07:53
I have a 50mm Sonnar from the 1950s on my Contax IIa which has a similar design. I note also that my 355/9 G-Claron in barrel has a very similar shaped diaphragm.

Oren Grad
17-Jun-2006, 09:13
Ken, the closest counterpart to that lens in Leica's current line, the 50mm f/1.4 Summilux ASPH, has a similar "scalloped" iris. The irises in many other M-Leica lenses have some degree of "scalloped" effect at certain aperture settings.

But these aren't LF lenses, so perhaps we'll get booted to the Lounge...