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.
