Aperture rings are continuously variable. You can set them anywhere in between the stops, at least on Pentax and Nikon bodies that allow aperture control that way. Wheels are restricted to 1/3 stops.
Although that's one reason why I like thumbwheels better than shutter dials. -Adam Shel Belinkoff wrote: > A couple of years ago I watched James Nachtwey using his Canon to > photograph some compelling war footage. He never moved the camera from his > eye, making all adjustments via thumbwheels on the camera. I could > immediately see the advantage to that. In addition, using electronic > aperture control via thumbwheel - at least on the Pentax cameras I've used > - allows more precise control of the aperture. The istDS, for example, can > be set to 1/3 stop intervals while, with the same lens, only 1/2 or, in > some instances, only 1 stop, intervals can be accurately used. For > example, with the lens that's on my camera now, one can only go from f11 to > f16 and from f16 to f22 when used manually, but with the thumbwheel the > lens can be used at f11, f13, f14, f16, etc. > > Shel > > > > >>[Original Message] >>From: Paul Stenquist > > >>Except the thumbwheels are better than the aperture control on the >>lens. With two thumbwheels, like those on the *istD, one can adjust >>either shutter or aperture while keeping both hands firmly on the >>camera and a finger on the shutter. I shot for 30 years with aperture >>rings. I've had no problem getting over them. I think you'll find >>that you will adjust quickly and without effort to the new layout. > > > > -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
