Pentax also had a costly quality control. Lenses were tested in Japan then sent to Usa where they were tested again before being sold here in USA. Its no wonder the lenses were of high quality, no duds ever got sold, they were rejected by QC dept.
I doubt Pentax still tests every lens twice. -- 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 Jeffery Smith Sent: Saturday, October 16, 2010 9:43 PM To: Pentax-Discuss Mail List Subject: Re: Tamron 28-75 f/2.8 I don't doubt that. I just never saw it touted publically until Vivitar ads. The mindset in the early 1970's was that, if a computer did it, it has to be right. I didn't believe that when a computer had Rocky Marciano knocking out Muhammad Ali. Jeffery On Oct 16, 2010, at 8:38 PM, J.C. O'Connell wrote: > FWIW - Pentax was using computers to help optical design > as early as the 1960's. Read it in one of their old brochures. > > -- > 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 Jeffery Smith > Sent: Saturday, October 16, 2010 8:48 PM > To: Pentax-Discuss Mail List > Subject: Re: Tamron 28-75 f/2.8 > > > And I should have mentioned "nice contrast" in the raw files I looked > at earlier. The biggest problem with zoom lenses when they first > appeared decades ago was poor contrast due to all of the elements and > glass/air surfaces. I think that the better lens coatings have helped > this. > > Are any of you old enough to remember the Vivitar ads that touted that > their lenses were "DESIGNED USING A COMPUTER. > > Jeffery > > On Oct 16, 2010, at 7:41 PM, Charles Robinson wrote: > >> On Oct 16, 2010, at 19:18, Jeffery Smith wrote: >> >>> I had a chance to use this lens for the first time today. The >>> conditions were not good (high noon, blinding sunlight, not a cloud >>> in the sky, low humidity). It sure is easier to carry around compared >>> to the tank-like Tokina 28-75 f/2.8. I'll try to post something >>> tomorrow (something shot in the shade). >>> >>> Do any of you have this lens? If so, what are your impressions? >>> >> >> This was my favorite go-to lens for most general photography until I >> got the Pentax 16-50 and it sat unused... I liked it a lot, but >> always wished it went WIDER. >> >> Manual focus on it was a little tricky.. not a lot of "throw" between >> one end and the other, but that and the not-wide-enough were my only >> complaints. Nice color, good out-of-focus renditioning, etc... >> >> -Charles >> >> -- >> Charles Robinson - [email protected] >> Minneapolis, MN >> http://charles.robinsontwins.org >> http://www.facebook.com/charles.robinson >> >> >> -- >> 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. > > > -- > 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. -- 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.
