Of course, John, you are right. Funny, somehow I managed to make myself believe it was working.
I even shot some frames around today's pic in my photoblog in this mode: http://photoblog.jbuhler.com/index.php?showimage=179 (istD, K24/3.5) I suppose that they ended up being usable because I was not more than a stop away from full open anyway. It would only take a simple firmware change to make the camera work this way though... j On 7/21/05, John Francis <[EMAIL PROTECTED]> wrote: > On Thu, Jul 21, 2005 at 01:33:35AM +0200, Juan Buhler wrote: > > This is so obvious that I?m surprised I haven?t seen it here before. I > > probably just missed it, but I only thought of it today, while > > shooting with the K24/3.5: > > > > - Set the camera to P > > - Dial the aperture I want > > - Set the exposure compensation in the camera so it will overexpose by > > as many stops as the difference between my selected aperture and the > > maximum aperture of the lens. > > > > Now the camera will expose correctly at the selected aperture. If you > > change it, you have to change the compensation accordingly. But as > > long as you keep the same aperture, the camera will set the shutter > > speed correctly as the light changes. Not fully automatic aperture > > priority, but an alternative to the green button option. It also has > > the limitation of being able to use apertures that are within 3 stops > > of full open, but that's rarely a problem for me, especially with the > > K24/3.5. > > > > Anyone here using K or M lenses that way? > > No, for a very good reason - the camera doesn't work that way. > > It doesn't really matter what aperture you set on the lens. > Not only does the camera meter at full aperture (as you know) - > it will also expose at full aperture, without stopping down > to your selected aperture (it does seem to briefly stop the > lens down at one point, but this is after the exposure has > been made). > > > -- Juan Buhler - SIGGRAPH 2005 Sketches and Posters Chair http://www.jbuhler.com photoblog at http://photoblog.jbuhler.com
