See what our knowledgeable Russian Engineer and Pentaxian Oleg V analysed and explained:-
http://forums.dpreview.com/forums/readflat.asp?forum=1036&thread=36859818
Oh well, whilst I don't find any flaw with Oleg's arguments, I think a real-world DR test is still required to find out the truth. So, let's wait for DPR's result, as I believe their DR test is closer to real-life and should be more meaningful.
Or, if you are just a K-5 user, you can follow the methodology and test adopted by that D5000 user as quoted by Oleg V, and the *usable* DR of the sensor/DSLR can still be found out briefly. Btw, I still prefer DPR's methodology of shooting a lightness "stair" simultaneously (and of course) as this is just what we want for the widest possible DR practically in daily shooting.
But if the DR of the new Sony sensor (of the K-5/D7000) is just measured to be lower later on, then it is just sad that now even sensor maker also does trick(s) to optimise their hardware for *benchmark*, which is just nothing about real performance, subsequent to what display card chipset/GPU makers have been doing this for years already, say, for the 3DMark.
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Wednesday, November 10, 2010
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Comments by IntenseDebate
High K-5 DR of the DxOMark: (Hardware) Mathematical Trick of the New Sony Sensor?
2010-11-10T18:30:00+08:00
RiceHigh
Computing Hardware|Image Quality|K-5|Other Bodies|Sensors|Software|Technical Articles|
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Spotmatic · 748 weeks ago
jaad75 · 748 weeks ago
rhermans · 748 weeks ago
RiceHigh 110p · 748 weeks ago
Michael A. · 748 weeks ago
Zebooka · 748 weeks ago
o_O
OGL · 748 weeks ago
Florent · 748 weeks ago
http://forums.dpreview.com/forums/read.asp?forum=...
And to quote his conclusion:
"In conclusion, no, the raw DR of the K-5 is not a trick or scam, and while it may have been achieved by some sort of innovative noise cancelling/reduction scheme inside the Sony sensor itself, as long as we can not see the effect in reduction of resolution/detail even at very low luminance levels, why would we care?"
Oleg himself was waiting for Gordon to peak in as he knows very well that he's THE authority when it comes to sensors analysis.
RiceHigh 110p · 748 weeks ago
My opinion in my this post is clear: I don't find any flaw in Oleg's arguments but neither do what he suspected have been proven. And afterall, real world exposure tests needed to be carried out to find out the DR, at different EV and lighting levels (which can affect the measured results, against what testers and reviewers have never mentioned!).
Anu · 748 weeks ago
Also your statement above about the need for "real world exposure tests" before known the DR is a sign that you don't appreciate the scientific method and proper test results that do not suit your agenda of hating current Pentax products ;) (Regarding the scientific method, I do want to see more proper tests, and not "real life shots" where a wild number of unrepeatable and uncontrollable variables come into play and make objective analysis difficult or impossible.)
Also, it seems - judging from above - that you do not understand dynamic range, what it is. Unless we're talking about long exposures (multisecond), and the light levels associated with those shots, the light levels do not influence DR basicly at all. The size of the well remains the same regardless of the light level, and the read noise also remains basicly the same. If the exposure is long, noise levels do tend to go up somewhat, but as long as we're talking about regular hand held photography, that is totally irrelevant.
If you do not see flaws in Oleg's arguments, please read Gordon's arguments in the same thread (multiple posts).
Mr Big · 748 weeks ago
LMAO!
Take two steps back and look at your blog.
Huston... we have a problem!
RuffRidahHK · 748 weeks ago
RiceHigh 110p · 748 weeks ago
Ben Boyd · 748 weeks ago
Wacko · 748 weeks ago
Tom · 748 weeks ago
So all is good. But let me guess, you will not pull back your useless blog entry, will you?
Tom · 748 weeks ago
Get it now, RH?
teusrenes 48p · 748 weeks ago
RiceHigh 110p · 748 weeks ago
R.E. · 748 weeks ago
James · 748 weeks ago
Aren't you ashamed of yourself?
Toomas Kadarpik · 748 weeks ago
You compare K5 with 5D1 even, I think it is not feasible, this new sony sensor beats the 5D1 in every aspect, except FF lens performance and diffraction limits - but this all depends what you are trying to do.
Sorry but you are not in the right track.
poppyer · 748 weeks ago