> In fact the Tamron 90 is somewhat legendary as a portrait lens. But > the AF on the AF version is so slow as to be useless for anything that > you can't reliably track in manual focus. Long focus throws are the > bane of AF performance and a requirement in macros.
Not from my experience, with the focus limiter it works just fine. Not as fast as say the FA135/2.8, but fast enough that's for sure. The build quality is pretty decent also, as good as the FA 100/2.8 which is similar construction to the FA 135/2.8 and reputedly better than the DFA 100/2.8 John ________________________________________ From: pdml-boun...@pdml.net [pdml-boun...@pdml.net] On Behalf Of Adam Maas [a...@mawz.ca] Sent: 29 April 2010 16:40 To: Pentax-Discuss Mail List Subject: Re: Macro lens recommendation needed. [Scanned][Spam score:8%] On Thu, Apr 29, 2010 at 10:51 AM, Sam L <samthegr...@gmail.com> wrote: > On Thu, Apr 29, 2010 at 9:40 AM, CheekyGeek <cheekyg...@gmail.com> wrote: >> IMHO, autofocus on a macro lens is ridiculous. >> The greatest value in macro lenses that I have seen is the Tamron SP >> 90mm f2.5 (either 52B or 52BB). WHAT a lens for very little money. >> You'll need the matched Tamron converter (or any good 7 element macro >> converter) to reach 1:1. Alternately, use an extension tube. > > > Could you also use a lens like the 90mm f2.5 for portraits? > If so, autofocus becomes handy. > > I think I have seen posts where people use their ~ 90-105mm lenses for > portraits, and I think those lenses were macros, but I could be > mistaken. > > --------------------------- > Sam > In fact the Tamron 90 is somewhat legendary as a portrait lens. But the AF on the AF version is so slow as to be useless for anything that you can't reliably track in manual focus. Long focus throws are the bane of AF performance and a requirement in macros. -- M. Adam Maas http://www.mawz.ca Explorations of the City Around Us. -- 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.
