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Thread started 06 Nov 2010 (Saturday) 19:03
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Pentax K-5 outperforms Phase One P65+ and Nikon D3s in Dynamic Range...how is this po

 
996gt2
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Nov 06, 2010 19:03 |  #1

What kind of sensor trickery is going on here? How can an APS-C sensor beat both a full-frame sensor (D3s) and a medium format sensor (Phase One P65+) for dynamic range?

I'm pretty skeptical about these results. K-5 is beating out a P65+ for dynamic range when the latter is 1) Medium format and 2) using 16 bit processing?

http://dxomark.com/ind​ex.php/en/Camera-Sensor/Compare-sensors/%28appareil1%2​9/676|0/%28appareil2%2​9/579|0/%28appareil3%2​9/628|0/%28onglet%29/0​/%28brand%29/Pentax/%2​8brand2%29/Phase%20One​/%28brand3%29/Nikon (external link)


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Nov 06, 2010 19:30 |  #2

996gt2 wrote in post #11237367 (external link)
What kind of sensor trickery is going on here? How can an APS-C sensor beat both a full-frame sensor (D3s) and a medium format sensor (Phase One P65+) for dynamic range?

I'm pretty skeptical about these results. K-5 is beating out a P65+ for dynamic range when the latter is 1) Medium format and 2) using 16 bit processing?

http://dxomark.com/ind​ex.php/en/Camera-Sensor/Compare-sensors/%28appareil1%2​9/676|0/%28appareil2%2​9/579|0/%28appareil3%2​9/628|0/%28onglet%29/0​/%28brand%29/Pentax/%2​8brand2%29/Phase%20One​/%28brand3%29/Nikon (external link)

Most of the extra DR is in the shadows on the K-5. It's there, but it will be joined by noise if you want to extract the whole thing. The D3, D3s and D700 have the extra DR spread out in the highlight and shadow range, allowing you flexibility to shoot normally and then adjust the shadow/highlight range.

The results are real. Nothing to be skeptical about. There are examples of on the net of massively underexposed shots that appear to be solid black frames that can be brought back from the dead.

16-bit vs. 14-bit vs. 12-bit has nothing to do with DR. It has to do with the # of tonal steps in the image. There are plenty of cameras that record >8EV of DR in SOOC JPEG output, and JPEG is only 8-bit/channel.


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Combatmedic870
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Nov 08, 2010 18:15 |  #3

What a great sensor!


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AdamJL
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Nov 09, 2010 23:25 |  #4

Combatmedic870 wrote in post #11249142 (external link)
What a great sensor!

Yyyyyyup. Great to see Pentax making stuff like this. Hope it continues and it piles on the pressure on the big guys.


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Yaamon
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Nov 10, 2010 09:13 |  #5

AdamJL wrote in post #11256928 (external link)
Yyyyyyup. Great to see Pentax making stuff like this. Hope it continues and it piles on the pressure on the big guys.

Exactly this is good for all camera manufactures.

This will put pressure on the manufactures and hopefully canon to make better quality sensor and not higher MP sensors. :lol:


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