To me, all the SDM's are kinda sluggish to focus, especially in really poor light. I found the benefit to the SDM motor to be largely the quietness and accurate focus, not the time to acquire focus.
I automatically just manually focus in low light. In acceptable light though, they snap quickly into focus with no hunting around the focus point. If it's hunting to the end stops then you have definitely got too little light. But focus isn't entirely an attribute of the lens, it's a system where the camera body and the lens both play a part. If you can't focus a DA* 55 in some given light, do you think that any other Pentax lens would focus? I rather doubt it. On Tue, May 24, 2016 at 1:40 PM, Larry Colen <[email protected]> wrote: > One of the reasons that I was interested in the DA 55 was that having its > own motor, I thought it should focus more quickly. When I was using it the > other night to photograph dancing, however, it seemed really slow to focus. > It also seemed to need to "hunt focus" more than a lot of lenses, rather > than just snapping to focus, it would rack all the way out, and then back > into focus. My 16-50 is normally quite good about focusing quickly, but I > tend to only use it where there is a lot of light (at least by my standards > of a lot of light). > > I couldn't compare it directly with my FA50 as it was in heavy use by > someone else. > > Has anyone else run into these issues? > > > -- > Larry Colen [email protected] (postbox on min4est) http://red4est.com/lrc > > > -- > 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. -- -bmw -- 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.
