Here it is:-
http://www.dxomark.com/index.php/eng/Camera-Sensor/All-tested-sensors/Pentax/645D
While the IQ of the 645D is higher than average, when compared to the majority of mainstream DSLRs, it does no better than the 135 Full Frame Nikon D3X nor the MF Phase One P40 (which is of about the same resolution). See this Comparison.
In fact, the 645D loses in all 3 major aspects under test, namely, colour depth, dynamic range, high ISO performance and hence obtains the lowest score amongst the 3 cameras in the comparison.
Related:-
Is MF Really Needed for Higher Pixel Count?
Comparison of Sensor Specs - 645D Against Others
Saturday, October 23, 2010
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radiantlite 29p · 751 weeks ago
compare to Nikon D3s, it has the same overall score of 82. D3x surpassed it by 6 points.
Anu · 751 weeks ago
Anhow, Mr. RiceHigh, please have a look at the DR-page of the 645 - as you see, one stop lost per each doubling of sensitivity, thus no variable gain.
In (the distant?) future medium format cameras will be using CMOS-sensors - CCDs simply can not compete any more against modern CMOS-sensors, when it comes it image quality apart from some spesific uses.
Compared to Phase One the AF of the Pentax should be far superior, as well as environmental shielding. Too bad it doesn't have SR ;)
Oh, and the Pentax is half the price of the P1.
Anyhow, the results are roughly what should have been expected - this is a budget medium format camera especially good for outdoor use. It has it's own niche and it fits there nicely. Of course it is kind of sad, but also exiting that a CMOS much smaller yields better S/N etc. than a medium format CCD.
OGL · 751 weeks ago
Compare with Hasselblad H3DII 50 and Leaf Aptus75S (20 000 USD and 33 000 USD)
OGL · 751 weeks ago
bandymelis · 750 weeks ago
The difference in the DxO test is purely theoretical, not really relevant in real life conditions. The results from 645D, when camera is used as it should, are stunning, as real life samples show.
By the way, the 645D is way too expensive for me (and two good for my needs). This is just a reply to your biased reasonings.
syam · 750 weeks ago
If you can remember, Ansel Adams was part of a group f/64.........
Because if you continue with this reasoning then your agument about Pentax not having a FF or rather a 35mm sensor is proven not valid. Ain't it?