It is worth checking whether given SDM lens also works with non-SDM camera. You know, the all-too-known compatibility thingie... One wouldn't want end up in the situation where there is a photog, a lens, and a camera, but all three cannot be used together...
On Sun, Jan 10, 2010 at 10:24 AM, Sandy Harris <[email protected]> wrote: > I have never used an autofocus system. I find myself comparing lenses > with an SDM motor to ones without. For example, the 17-70 f4 has SDM > but 16-45 does not. 55/1.4 does but 50/1.4 and 70/2.4 do not. > > There are plenty of other differences -- notably price, weight and > focal length -- and I have some idea how to balance those in relation > to my usage and preferences. However, I don't have much idea how > important or useful the SDM motor is, so I am asking here. > > Is this something that should be ignored in making a choice? An > important factor? Somewhere between? > > -- > 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. > -- Boris -- 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.
