Originally posted by cbaytan I doubt it if K-5's CMOS sensor can give same color quality and 3D look as K200D CCD sensor, don't we all see those hazy, soft K-5 samples every day, proudly presented as perfect images? From my internet watch, on the FF and APS-C arena there is only one camera can beat the K200D's color quality and 3D look, which is Nikon D3x, even though it has a CMOS sensor, I don't know how they succeeded. I don't know how Samsung succeeded to produce such good sensor on K200D/K10 either. Don't forget K200D sensor is the same with K10 which resurrected Pentax' old reputation in the digital arena. I believe Pentax owes a lot to this sensor.
I'm not doubting your feelings on this but... the K-5 definitely has a better sensor than the K200D.
And the question that would naturally lead this statement is, what good reasons do you have for saying that?
And this is the main issue I see with arguments such as these. Questions that are governed by product knowledge, experience and shooting technique. And please don't take this the wrong way, this certainly isn't a personal criticism.
Having said that, I think a good way to explore the differences between sensors would come by identifying the strengths and weaknesses of each system and learning how to use them.
ie. how does one tap into the extra colors and pixel quality/fidelity or dynamic range?
And I think the answer to this goes hand in hand with the reality behind sensor performances.
One good example of this phenomenon can be seen earlier in this thread. At which point, samples were provided to help illustrate many of the advantages of the K-5 sensor. To which I'd ask... what level of photography are we talking about? And if someone were to say, at a point and shoot level(no processing), then I would likely agree.
However... if we we were talking RAW performance... then I'd say we've got something major to chew on.
PS. My wife and I used a K200D for over two years as a primary and secondary body at work. And though there was nothing inherently wrong with the K200(per say), it did prove to have its share of limitations. Though on the per pixel sharpness level, it proved sharper than the K20D. However... there's no denying the K20 would easily match the K200D in post.
And so in summary, I'd say that in RAW, the K-5 files are not only better, but more accurately "much better" than the K200D could ever produce. And that's including the areas where very little headroom existed for improvements(ie. color range etc).
One good example of this can be found with sharpness/microcontrast(or 3D as some call it).
But is the 3D effect truly a direct derivative of a sensor? And though there's no doubt the sensor would play a role in this, I'm not convinced it is so much sensor output as it is lens performance. And I say this based on the numerous examples of microcontrast that I've seen over the years.
Though on the issue of sharpness and microcontrast, we are left with questions on RAW file performances such as;
How much information is present in the files, and how does they respond to processing?
What about grain and pixel quality and artifacts?
How well does the file respond to color and detail extrapolation?
And what of the shadow and highlight data regions? Are they accurate? and how much headroom are in the files?
Therefore, beyond body functions and performance, we find a great number of attributes that would play a part in the overall IQ of a system. Which leads us to the question... Is it truly better? or are we under the impression that its better from our current standpoint? And I think its the answers to these questions that will ultimately answer the BIGGER one.
And so, I think there are many more areas that need addressing in order to formulate an accurate assessment of how the K200D sensor weighs-in against other sensors. Then again... some groups(or organizations) have taken it upon themselves to measure RAW sensor performance as well. DxOMark for example, has a well established reputation of assessing sensor performances and publishing marks for various areas. Which I think provides us with a good baseline from which to carry out our own evaluations. - Which all leads us to the same primal question.. How does one evaluate the various aspects of sensor performance?
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Last edited by JohnBee; 05-06-2011 at 04:05 AM.