seems like it would have to be off by more than 0.36mm for the results your getting, something doesn't add up.
-- 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 Dario Bonazza Sent: Tuesday, March 15, 2011 8:05 PM To: Pentax-Discuss Mail List Subject: Re: Pentax glass on m4/3: weird behavior Let's do some math: K bayonet register = 45.46mm m4/3 register = 19.25mm Then K-m4/3 adaptor must be 45.46 - 19.25 = 26.21mm A caliper reads 25.85mm for my adaptor. Hence it looks like being 0.35mm short. Is that enough for such a weird behaviour? Dario ----- Original Message ----- From: "Dario Bonazza" <dario.bona...@virgilio.it> To: "Pentax-Discuss Mail List" <pdml@pdml.net> Sent: Wednesday, March 16, 2011 12:41 AM Subject: Re: Pentax glass on m4/3: weird behavior > No name on it, found in ebay from Hong Kong. I bought it some time > ago, > but I can no longer find trace of that auction. However, it could be this > one: > http://cgi.ebay.com/Pentax-PK-K-lens-Micro-4-3-Adapter-EP-1-GF1-G1-GH1-/2506 30349531?pt=Lens_Accessories&hash=item3a5abba2db > > Dario > > ----- Original Message ----- > From: "Steven Desjardins" <drd1...@gmail.com> > To: "Pentax-Discuss Mail List" <pdml@pdml.net> > Sent: Tuesday, March 15, 2011 11:53 PM > 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 >> <dario.bona...@virgilio.it> 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 > 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. > > > ----- > Nessun virus nel messaggio. > Controllato da AVG - www.avg.com > Versione: 10.0.1204 / Database dei virus: 1498/3507 - Data di > rilascio: > 14/03/2011 > -- 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.
