That's interesting and could truly explain the problem, thanks Stan! Dario
----- Original Message ----- From: "Stan Halpin" <[EMAIL PROTECTED]> To: "Pentax-Discuss Mail List" <[email protected]> Sent: Monday, February 19, 2007 7:01 PM Subject: Re: K10D overexposure anyone? >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 -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
