On Thu, Apr 02, 2009 at 06:57:22AM +0200, Michel Carr?re-G?e wrote: > Larry Colen a ?crit : >> The m42 lenses stop down by pushing in on the rod. The k-mount stop >> down by pushing sideways on a lever. I can imagine something where >> the widget that pushes sideway on a lever, would push on a hinged >> doo-hickey (pardon the technical engineering jargon) that then pushed >> on the rod on the lens. >> >> Does such an m42 to k-mount adapter exist? >> >> > You can modify an adapter > http://www.jr-worldwi.de/photo/index.html?M42_auto_adapter_Pentax_PK.html
That doesn't couple the stop-down pin on the lens to the stop-down lever of the K mount - it's just for auto-aperture screw-mount lenses, to stop them down (all the time). Without that they'll always be at full aperture. That's why you generally want screw-mount lenses with an auto/manual switch; in the manual position the lens will stop down to the selected aperture. You still only get stopped-down metering, but at least you're not stuck at full aperture on the lens all the time. -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
