I have the M version, it has the coupler and stops down automatically. The aperture ring was moved from in front of the focus ring to just in front of the mount, presumably to make auto operation possible.
On 20 October 2010 01:35, J.C. O'Connell <[email protected]> wrote: > What I am trying to confirm is if the M version has > the stop down lever and closes the aperture down > during moment of exposure. The early K400 had no > such lever or action. the aperture just stayed at > whatever setting the aperture ring was set to. > This makes the K version fully manual. > > -- > J.C. O'Connell (mailto:[email protected]) > Join the CD PLAYER & DISC Discussions : > http://tech.groups.yahoo.com/group/cdplayers/ > http://launch.groups.yahoo.com/group/cdsound/ > > > -----Original Message----- > From: [email protected] [mailto:[email protected]] On Behalf Of Jens > Sent: Tuesday, October 19, 2010 3:39 PM > To: Pentax-Discuss Mail List > Subject: Re: RE: Enablement: SMC Pentax-M 1:5.6 400mm > > > > Hello J.C. O'Connell > It's an M lens. Meaning manual setting the aperture - F.5.6- f 45. It's a > spring aperture, so I still have open aperture fokusing. No electrical > contacts like an A-lens. Manual focus too. I use it utilizing the "green > button" for measuring light (no open aperture metering). If I use it with my > 1.7x AF converter I get 680mm and Auto Fokus. > > I own many M-lenses and a few K-lenses. (M stands for Compact Designs - > meaning lightweight and rather small). > > Regards > Jens > -- > Treat others as you would like to be treated yourself. > > On Oct 19, 2010 18:18 "J.C. O'Connell" <[email protected]> wrote: >> Is the aperture automatic or manual? >> the old screwmount and early K mounts >> were manual. >> >> -- >> J.C. O'Connell (mailto:[email protected]) >> Join the CD PLAYER & DISC Discussions : >> http://tech.groups.yahoo.com/group/cdplayers/ >> http://launch.groups.yahoo.com/group/cdsound/ >> >> >> -----Original Message----- >> From: [email protected] [mailto:[email protected]] On Behalf >> Of Jens >> Sent: Tuesday, October 19, 2010 11:38 AM >> To: Pentax-Discuss Mail List >> Subject: Enablement: SMC Pentax-M 1:5.6 400mm >> >> >> I just got one of these old Pentax-M lenses from Germany/Ebay at a >> resonable price - appr. 380 USD/272 Euro. >> >> It's very nice - and quite close to "like new" - except for the >> leather case. I did some tests agains my "doggy" Sigma DG 135-400mm. >> Actually, the >> Sigma seems to be sharper at f. 5.6, but the Pentax 400mm improves >> significantly at f. 11 - f. 16. >> >> I am a bit disappointed with the sharpness fully open. I guess I >> should make some more test in better light, with faster shutter >> speeds. I'll let you >> know. >> >> Se some of the test shots here: >> http://www.flickr.com/photos/bladt/sets/72157625198204652/ >> >> Regards >> Jens >> >> >> >> -- >> Treat others as you would like to be treated yourself. >> >> >> -- >> 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. >> >> >> -- >> 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. > > -- > 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. > > > -- > 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. > -- Eric -- 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.
