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
