I haven't paid close attention to all of the circumstances, but it seems to me that I have had similar problems both with the *istD and the K10D. Shooting most of the time on P setting, and adjusting via the dials for shutter speed or depth of field, it seems that sometimes the camera gets "stuck" on a setting. This is particularly true when changing lenses. Dario, you said:
> "when a well-lit subject in bright sunlight reads say 1/30 F8 with > 100 ISO (when you > expect something around 1/125 F8) you get suspicious of such a > reading... This is the misbehavior I have seen. A quick push of the Green Button brings the camera out of its stupor and the reading back to what it should be. Stan On Feb 19, 2007, at 4:50 AM, Dario Bonazza wrote: > Jens (and others), > Those raising my concern weren't test shots. They were actual shots > while > changing scenes, framing and lenses all the time when busy shooting > the > Venice Carnevale. I was simply disappointed by how many badly- > metered scenes > I got at first attempt, as opposed to a far more consistent > metering the > *istD performed. > I'm convinced it's a metering problem and not a shutter one, > because when a > well-lit subject in bright sunlight reads say 1/30 F8 with 100 ISO > (when you > expect something around 1/125 F8) you get suspicious of such a > reading, > don't you? Then the shutter does what the meter said and the shot > is... +2EV > overexposed, of course! > > This morning I've shot several frames under controlled conditions > (tripod, > exactly same framing all the time, etc.) and guess? No problem at > all. Only > the usual difference between the D and the K10D. Typical readings > with the > DA 16-45 and ISO 200 on both cameras gave 1/800 F5.6 with the D and > 1/500 > F5.6 with the K10D, less than 1 EV apart. That's the usual > behaviour of the > K10D compared to the D. That's the usual way the K10D performed > before last > Saturday, getting only two-three remarkable exceptions of badly > overexposed > shots out of 500-600 (less than 1%, as opposed to say 20% wrong > readings > last Saturday). > > So I still have to understand what happened last Saturday in Venice > and > figure out when (and why!) it will happen again. > > Dario > > ----- Original Message ----- > From: "Jens Bladt" <[EMAIL PROTECTED]> > To: "Pentax-Discuss Mail List" <[email protected]> > Sent: Monday, February 19, 2007 8:05 AM > Subject: Re: K10D overexposure anyone? > > >> Dario. Did the light change? >> You experience is similar to my very first test, although they >> were done >> under not too constant light conditions. >> I'd say the *ist has a matricx metering more similar to CW. The K10D >> matrix >> metering seem to be more responsive to light differences in within >> the >> frame. >> But this is merely guessing. >> Did you post you r test shots (I didn't see a link) >> Regards >> >> Jens Bladt >> Nytarkort / Greeting Card: >> http://www.jensbladt.dk/godtnytaar2007/lydshow.html >> >> http://www.jensbladt.dk >> +45 56 63 77 11 >> +45 23 43 85 77 >> Skype: jensbladt248 >> >> -----Oprindelig meddelelse----- >> Fra: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] vegne >> af Dario >> Bonazza >> Sendt: 18. februar 2007 23:15 >> Til: Pentax-Discuss Mail List >> Emne: Re: K10D overexposure anyone? >> >> >> Thanks Jens. However, what surprises me is that those same lenses >> gave me >> underexposure with the D and are giving overexposure with the >> K10D. More >> suprising, is that such overexposure can vary a lot, even with the >> same >> scene, framing (OK, lets say almost same framing, since those >> pictures >> were >> not shot on a tripod) and camera settings. >> >> Well, I believe I'm going to better test all this tomorrow, with >> the D, >> the >> K10D and a tripod. >> >> Dario >> >> ----- Original Message ----- >> From: "Jens Bladt" <[EMAIL PROTECTED]> >> To: "Pentax-Discuss Mail List" <[email protected]> >> Sent: Sunday, February 18, 2007 10:29 PM >> Subject: RE: K10D overexposure anyone? >> >> >>> I think (thought) I saw some problems a few days ago, when I >>> tested the >>> K10D >>> against the *ist D. >>> The "test" showed a tendency towards the K10D over exposing. I >>> interpreted >>> this, however - not as overexposure - but as over REACTING to back >>> light/bright sky. >>> I did repeat this test the next day (by swoping the samples of >>> the used >>> lens model, used on both cameras). The repeated tests did NOT >>> confirm my >>> first test. The difference may have been caused by the lens >>> rather that >>> the >>> meter/camera. >>> >>> I did a few shots today. I was not really testing, but just >>> shooting, >>> using >>> my usual method for dertermining the right exposure, which is >>> individual >>> subject evaluation. >>> Today's shooting did not point towards any speceific exposure >>> problems. >>> The used exposure correction (from 0.0 to +0.3) is noted below >>> each shot >>> (you must open each photo in order read this. >>> http://www.flickr.com/photos/bladt/sets/72157594542993105/ >>> >>> I see no real problem here! Do you? >>> Regards >>> >>> Jens Bladt >>> Nytarkort / Greeting Card: >>> http://www.jensbladt.dk/godtnytaar2007/lydshow.html >>> >>> http://www.jensbladt.dk >>> +45 56 63 77 11 >>> +45 23 43 85 77 >>> Skype: jensbladt248 >>> >>> -----Oprindelig meddelelse----- >>> Fra: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] vegne af >>> Bruce >>> Dayton >>> Sendt: 18. februar 2007 21:15 >>> Til: Pentax-Discuss Mail List >>> Emne: Re: K10D overexposure anyone? >>> >>> >>> I haven't noticed any problems, but then, I use center weighted and >>> manual. I meter just about like I was using an MX. Pick something >>> that has a medium tone for metering and set the meter accordingly, >>> then compose, focus and shoot. >>> >>> -- >>> Bruce >>> >>> >>> Sunday, February 18, 2007, 8:24:30 AM, you wrote: >>> >>> PS> I haven't experienced overexposure problems, but I never >>> shoot in >>> PS> straight program mode. In hyperprogram, TAv, Av and Tv modes, >>> I get >>> PS> good exposure results. My exposure comp is usually at zero or >>> plus >>> .3. >>> PS> Paul >>> PS> On Feb 18, 2007, at 9:42 AM, Dario Bonazza wrote: >>> >>>>> I find my K10D to be adjuted for slight overexposure, let's say >>>>> around +0.3 >>>>> stops, as opposed to the *istD tipically showing around -0.7 to -1 >>>>> underexposure. >>>>> Maybe the *istD was trying to protect again burnt-out highlights, >>>>> while the >>>>> K10D is mostly trying to fight noise. Anyway, I consider those >>>>> above being >>>>> just different designers' choice, and not a big problem when you >>>>> are aware >>>>> of that. >>>>> >>>>> However, very often (10-30% of shots, according to different >>>>> shooting >>>>> situations) my K10D gives badly overexposed readings, far >>>>> exceeeding that >>>>> +0.3 reported above. It's not uncommon I get say +2 to +3 stops >>>>> overexposure, which means pure crap. >>>>> Not sure, but apparently the bad behavior occurs much more in >>>>> bright >>>>> sunlight. The camera was set to P and auto ISO setting, hence no >>>>> risk to >>>>> fall outside hardware capabilities for getting proper exposure. I >>>>> tried both >>>>> multi-pattern and center-balanced metering, with little >>>>> difference. >>>>> Maybe >>>>> multi-pattern is more prone to wild overexposure than center- >>>>> balanced, but >>>>> I'm not yet sure of that. >>>>> >>>>> Another K10D owned by a friend of mine does exactly the same. Has >>>>> anyone >>>>> else seen such a behavior? >>>>> >>>>> Dario >>>>> >>>>> >>>>> -- >>>>> 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 >>> -- >>> No virus found in this incoming message. >>> Checked by AVG Free Edition. >>> Version: 7.5.441 / Virus Database: 268.18.1/691 - Release Date: >>> 02/17/2007 >>> 17:06 >>> >>> -- >>> No virus found in this outgoing message. >>> Checked by AVG Free Edition. >>> Version: 7.5.441 / Virus Database: 268.18.1/691 - Release Date: >>> 02/17/2007 >>> 17:06 >>> >>> >>> -- >>> 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 >> >> -- >> No virus found in this incoming message. >> Checked by AVG Free Edition. >> Version: 7.5.441 / Virus Database: 268.18.1/691 - Release Date: >> 02/17/2007 >> 17:06 >> >> -- >> No virus found in this outgoing message. >> Checked by AVG Free Edition. >> Version: 7.5.441 / Virus Database: 268.18.1/691 - Release Date: >> 02/17/2007 >> 17:06 >> >> >> -- >> 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 -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
