Does the lens auto focus on a *istD? If it doesn't have the old clutch, I assume it only can AF on the K10D and K110D and K100D?
Op Wo, 8 augustus, 2007 03:55, schreef Bruce Dayton: > First report: > This will mostly be in comparison to the DA 16-45/4 - which I have and > use quite extensively. > > It appears, at least for this lens, that Pentax has a new lens cap > designed a bit more like the Tamron caps where there are inner grips > to squeeze. It is more rounded than the Tamron and looks very nice. > It is an improvement over the standard cap I am used to on Pentax > lenses. > > The 16-45 zoom mechanism is unusual in that as the lens extends, the > focal length shortens - rather opposite of what you would expect. The > DA *16-50 is the opposite - as the lens extends, so does the focal > length. > > The fit and finish are improved and it handles much more like an FA * > lens. It doesn't use the old clutch system, but the focus manually is > very similar in that it doesn't turn during AF and you can turn the > focus ring past the ends of proper focus - those of you who have use > FA* lenses will know what I mean. > > It is a bit larger lens than the 16-45 and a bit heavier. The hood > seems to be built to have more use - my 16-45 hood is wearing off the > small detent that locks it in place. The DA*16-50 is much beefier. > But it is not anything like the FA*85 or FA*200 hoods. > > I took both lenses and wandered around outside my house and took some > quick shots using AF-S and AV priority. The SDM is very quiet- not > absolutely soundless, though. If it is very quiet, you can hear it > settle/lock focus. Tons quieter than the old system, though. > > My impression was that the DA* lens seemed to focus slightly more > accurately than the DA 16-45. It also seemed a bit faster, but not > obviously. I didn't really try it on moving targets. > > The exposures seemed slightly different between the two lenses - the > DA* was slightly darker/richer - could be contrast or could be > exposure - haven't delved deep into that yet. The few blowups that I > looked at - from Breezebrowser quick conversions (no adjustments), the > DA* seems a bit sharper than the 16-45. > > Some first impressions - I'll try to write more when I have something > to say. > > -- > Bruce > > > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > -- Frits Wüthrich -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
