Pre-A lenses (which lack the A setting) can only be used in Manual mode, with stop-down metering (metering readout via the DoF preview, or hit AE lock to get the camera to stop the lens down and set an appropriate shutter speed). Aperture priority will simply work wide open only. Program and Shutter priority will function the same as aperture priority does. You get Centre-weighted and Spot metering. TTL flash will not work.
You need to enable a Custom Function to get this to work. -Adam Glen Berry wrote: > Hi, > > I have a Pentax DS, and I'm thinking of buying a used manual focus 28mm > lens for it. I already have a 50mm f2.0 manual focus lens and I like the > image quality and fast maximum aperture quite a lot. > > My 50mm f2.0 lens has an "A" setting on the aperture ring. I leave the > lens set on this, and adjust aperture on the camera body. I like it just > fine that way. > > However, I've noticed that some of the used 28mm lenses I've seen have > an "A" setting on their aperture rings and some don't. What would be the > disadvantage, for a DS user, to not having the "A" setting on the > aperture ring? I assume that shutter-priority and program-mode auto > exposure would be out of the question. Is there anything else I should > know about? Would I have to use "stop-down" metering with such an lens? > > thanks, > Glen > -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
