Igor, The DSLR bodies allow setting the aperture in Manual, Av, TAv, and Sv modes in steps of .5 or .3 EV. They report settings with that resolution in the embedded metadata. Whether the body can or does set the aperture steplessly in Tv and Program mode is irrelevant as there's no way to control it or report the setting beyond that.
Godfrey On Mar 26, 2007, at 11:05 AM, Igor Roshchin wrote: > > > Hello! > > Sorry for bringing up this question that may be known to most > of the people here. I just realized that I don't know it, and couldn't > find the information on the KMP site or elsewhere on the web. > > This question is about aperture control design. > For the A and later lenses that have "A" setting on the aperture > ring, - > what is the step of the actual aperture setting in this mode? > If it doesn't coinside with F-stops or 1/2-F-stops, then is it > body-dependent (i.e. is one body more capable to utilize > sub-1/2-f-stops then another) or is it standardized? > > I realize that the motion of the diaphragm actuator in the lens is > stepless, so it is up to the body to choose the steps, if any > (is it determined by the DAC bitness?) > > Thank you, > > Igor -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net
