Yes, you're beyond the metering range of the camera for semi- automatic stop-down mode.
G On Mar 19, 2007, at 6:20 PM, Mike Hamilton wrote: > ISO 1600 and K10D. I'm using the Green Button, have tried setting it > to Program Line and to Tv Shift (in Custom Functions). I'm also using > a genuine Pentax adapter. > > Upon doing some further testing, it appears as though it maybe a > combination of two things: User Error (forgetting that there is spot > metering with Tak lenses), and that with a small aperture, not enough > light is getting to the metering sensors to register (below 0 EV?) > > When I directed the spot meter at a white wall instead of a black > frame, I achieved 1/30 second at f4, 1/13 second at f/5.6, 1/5 sec at > f/8, and then it begins blinking at f/11, (indicating that the meter > has bottomed out, I presume). > > I suppose that is where flash comes in handy... > > Mike > > On 3/19/07, Godfrey DiGiorgi <[EMAIL PROTECTED]> wrote: >> What ISO are you setting? and which body? >> >> Godfrey >> >> >> On Mar 19, 2007, at 5:29 PM, Mike Hamilton wrote: >> >>> I really don't want to stir up any huge debates here; I would simply >>> like some help in getting this right. >>> >>> I recently came into possession of two Takumar lenses. Both are f/4 >>> at maximum aperture. I'm really having a hard time with metering; >>> both seem to meter only at f/4, even if I stop down the lens. >>> >>> I'll describe what I am doing: >>> >>> 1. Lens (takumar 50mm f/4 macro) is set so that the red "MAN" is >>> showing (that's manual mode, right?) >>> 2. Camera has had the option for aperture ring use turned on. >>> 3. Mode switch is in Manual. >>> 4. Camera mounted on tripod. >>> 5. Location is indoors with constant lighting. >>> >>> Now here are my results: >>> (f/4): 1/10 sec >>> (f/8): 1/5 sec >>> (f/16): 1/5 sec >>> (f/22): 1/5 sec >>> >>> What's happening here? >>> >>> I tried a similar test with the Takumar 200mm f/4 and the meter >>> reading would not change even when i moved the aperture from 4 to >>> 22. >>> >>> Assistance is much appreciated. >> >> >> -- >> PDML Pentax-Discuss Mail List >> [email protected] >> http://pdml.net/mailman/listinfo/pdml_pdml.net >> > > > -- > > Cheers, > > [EMAIL PROTECTED] > MichaelHamilton.ca > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
