http://www.zenit.istra.ru/archive/lenses/helios-40.html
the russian text reads: "six lenses, coated, high-speed anastigmat with somewhat longer, compared to normal lenses, focal length. has an iris diafragm and a pre-set ring." also, on the page: resolving power (accurding to "technical conditions" -- specs, i guess) 32/16 coefficient of transmittance: 0.75 as far as i understand, helios 40-2 has the same formula, just different coatings and filter sizes. best, mishka On Mon, 25 Oct 2004 09:51:10 -0400, Fred <[EMAIL PROTECTED]> wrote: > > http://dantestella.com/technical/helios.html > > Does anyone know what the optical configuration is for the Helios > 85/1.5? I'm curious if it is anything like that of the K-mount MC > Zenitar-K 85/1.4? > > Fred > >
