Pentax engineers put a ring inside the f2.0 lenses to restrict the aperture.
Wilko Bulte wrote: > On Mon, Mar 26, 2007 at 01:02:39PM -0500, Bob Sullivan wrote.. > >> 40 years since they made these lenses. >> The 2.0 and 1.8 are optically equivalent (elements, etc.) >> > > What is it that accounts for the difference in speed, do you know? > > >> Any competent repairman could have salvaged 1 good lens from 2 poor ones. >> > > The build quality is excellent. I once had one of mine apart for servicing, > this is just a different league from all that plastic stuff we have these > days >:-| > > Wilko > > -- Entropy Seminar: The results of a five yeer studee ntu the sekend lw uf thurmodynamiks aand itz inevibl fxt hon shewb rt nslpn raq liot. -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
