The lens *is* set to F/22 (on the lens, not via the body) On Wed, May 16, 2012 at 01:17:45AM -0400, jn289 wrote: > You are trying to use older extension tubes, that does not have > contacts on them for the the digital body. > You will have to set the lens to f22 on the lens itself and not with > the camera. The reason it works right when just the lens is on the > camera is because it is a A lens with contacts. With the extension > tube between the body and lens you are breaking the contact > connection..You will have to shoot just on manual. Now it you did > get the tubes with contacts, maybe the contacts are dirty, but I do > not think anyone makes them with contacts at this > time............Joe > > > > >I've run into a problem trying to use my (Vivitar) auto extension > >tubes with my K-5. > > > >Scenarion: Camera set to "M", lens (A 50/f1.4) set to f/22. > > > >With the lens directly mounted to the camera, everything works as > >expected: DOF preview stops the lens down to f/22, and the exposure > >check showshow far I am off from correct exposure. Taking theshoot > >results in an image correctly exposed at f/22. > > > >If I put one of the extension tubes in place, though, the lens > >stays wide open at all times, and the image is captured at f/1.4 > >[no other changes to the settings on either lthe lens or the body] > > > >This is not what I expect (or want). Any clue as to what is wrong? > > > >Fortunately I have a work-around; using the Fotodiox K-mount-to-m43 > >adapter (and the same lens & extension tubes) on the Olympus E-PL1. > > > >Here's what I was trying to photograph: > > > > http://www.jfwaf.com/temp/pfsmini1.jpg > > > >That's a small metal figure a friend of ours painted for my wife to > >use when we participate in tabletop role-playing games (Pathfinder). > >For a size reference, the large knurled circular plinth at the very > >bottom of the shot is a metal K-mount body cap. > > > >-- > >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.
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