This seems to be a problem with both Sigma and Tamron lenses...focusing issues due to questionable quality control. One would think that they would improve the mechanical performances of the lenses inasmuch as they are dong a great job with the glass lately.
Jeffery On Oct 17, 2010, at 12:36 PM, David J Brooks wrote: > Good examples. > > The problem i had with my two, on the K10D,, was from f4 to f 2.8. > Terrible focus. From f5.6 up it was stellar > > DAVE > > On Sun, Oct 17, 2010 at 1:28 PM, Jeffery Smith <[email protected]> wrote: >> http://400tx.blogspot.com/2010/10/tamron-sp-af-28-75-f28-macro-zoom-lens.html >> >> N.B., the lens was mounted on a full frame Sony 850, not a Pentax K. >> >> Jeffery >> >> -- >> 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. >> > > > > -- > Documenting Life in Rural Ontario. > www.caughtinmotion.com > http://brooksinthecountry.blogspot.com/ > York Region, Ontario, Canada > > -- > 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.
