sounds like the adapter is not long/thick enough for proper infinity registration.
-- 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 Steven Desjardins Sent: Tuesday, March 15, 2011 6:54 PM To: Pentax-Discuss Mail List Subject: Re: Pentax glass on m4/3: weird behavior I'd like to hear this myself. What brand of adaptor? On Tue, Mar 15, 2011 at 6:02 PM, Dario Bonazza <[email protected]> wrote: > Hello gang, > > I've just tried a few Pentax lenses on my Panny GF-1 (via K-micro4/3 > adapter), just to find a weird behaviour. > > With close subjects (inches to meters), the actual distance of my > subject (properly focused by looking at magnified LCD) can be similar > to that one indicated on the distance scale of the lens. However, when > trying to properly focus at infinity I have to set a much closer > distance on the lens ring, with larger and larger offsets as focal > legths shorten. > > Examples: > 100mm lens focused at infinity -> focusing ring is set at 15-20m; 50mm > lens focused at infinity -> focusing ring is set at 7-10m; 28mm lens > focused at infinity -> focusing ring is set at 3m! > > With a Samyang 8mm fisheye, there's no way to focus (lens helicoid has > no run enough to find focus). It happens that by setting the focus at > its minimum focus distance, the lens is almost (but not yet) focused > at infinity. By approaching the subject, things become worse. > > Have you ever seen anything like that? How would you explain that? > Wrong adapter? Too short to set proper register distance for K-bayonet > lenses? > > Cheers, > > Dario > > -- > 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. > -- Steve Desjardins -- 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.
