Archived posting to the Leica Users Group, 2004/05/29
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]i have a summitar 933275 it does indeed have 6 dome-shaped aperture blades. there seem to also be 2 sets of blades in total set of 6 cut with straight edges, and then 6 with curved edges. the latter do not ever seem to form any part of the iris. it's a curious design; i never noticed it as i have a weakness for shooting all things wide-open. -rei On May25 17:03, Thinkofcole@aol.com wrote: > Lager says early Summitars have flat diaphram blades that form a circular > aperture while later Summitars have domed [forward curving] blades that form a > hexagonal opening. He adds that Summitars after Nov. 1945 [@ #587601] are > factory coated and from early 1946 [about #611000] have international apertures to > f16.-- bob cole > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information -- Rei Shinozuka shino@panix.com Ridgewood, New Jersey