I'd love to see a gallery of photos you took using av mode/m42s so I can see for myself how accurate the metering is. When I do it that way I get a lot of junk.
Sent from my phone. On Nov 5, 2010, at 10:46 PM, "J.C. O'Connell" <hifis...@gate.net> wrote: > > av mode will work on pentax DSLRS > using M42 lenses because the metering > is based on actual light reaching > sensor, so if you shoot a shot at F4, > it will give a specific shutter speed, > but if you stop down, less light reaches > sensor and slower correct shutter speed > will occur. > > -- > J.C. O'Connell (mailto:hifis...@gate.net) > Join the CD PLAYER & DISC Discussions : > http://tech.groups.yahoo.com/group/cdplayers/ > http://launch.groups.yahoo.com/group/cdsound/ > > > -----Original Message----- > From: pdml-boun...@pdml.net [mailto:pdml-boun...@pdml.net] On Behalf Of Sam > L > Sent: Friday, November 05, 2010 10:01 AM > To: Pentax-Discuss Mail List > Subject: Re: m42 takumar 300/4 > > >> On Thu, Nov 4, 2010 at 3:10 PM, Charles Robinson <charl...@visi.com> >> wrote: On Nov 4, 2010, at 14:03, Subash wrote: >> >>> hi, >>> >>> anybody have experience with this lens? pretty heavy, a little over >>> 1.5kg, but i saw one today for sale, it's in almost mint condition >>> and so badly needs a caring home :) the one i saw today is the one on >>> this >>> page: >>> >>> http://www.pentaxforums.com/lensreviews/Takumar-300mm-F4-1962.html >>> >>> i guess what i really want to know is that once mounted with an m42 >>> adapter, does one use this like a K/M lens with stop-down >>> metering/green button? would appreciate any input you may have... >>> >> >> It will be different. The aperture does not get held open, so if >> you're dialing the lens down to f/11 you'll be looking through a lens >> which is actually stopped down to f/11. >> >> On the bright (ha!) side, metering in Av mode would be real-time with >> no need for the green button. > > > Charles, forgive me for asking, but do you actually use m42 lenses on a > recent pentax dslr? > > I ask because I think it is a little misleading to say that metering in Av > mode is "automatic". Let me immediately state that I'm a nOOb at both dslrs > and m42s. But my experience is that when working with pentax dslrs and m42 > lenses: > - Av mode will work correctly ONLY if your aperture is wide open. if you > want to stop down the lens, then the metering gets helplessly inaccurate. > - Manual mode: the meter works reliably but requires one extra push of your > metering or green button. (focus, set your aperture on the lens such that > the blades actually visibly stop down, press the green button, fire away). > > I'm not trying to be a jerk but trying to get a better understanding for > myself as well as others. Everyone feel free to enlighten me! > > Thanks, > --------------------------- > Sam > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > 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 > PDML@pdml.net > 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 PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
