On Oct 17, 2010, at 10:46 AM, Jeffery Smith wrote: > 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.
That's pretty much exactly the complaint I have with my sigma 20/1.8. The glass is stellar but it's tough to focus manually. > > 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. -- Larry Colen [email protected] sent from i4est -- 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.
