DXO mark

Started Apr 19, 2012 | Discussions thread
Kaj E
Veteran MemberPosts: 8,793Gear list
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Re: DXO mark
In reply to xfz, Apr 21, 2012

xfz wrote:

Although I never really care about DXO's over sensor marks, I will take their ISO/SNR measurement. Here is the my findings on 5d3 vs D800.

Manufacture ISO vs "Real" ISO,

Still remember all the talks when IR had their test out, the "over exposure" of 5d3, here is DXO marks result:

Nominal D800 5D3
ISO
00100 00074 00080
00200 00149 00160
00400 00297 00323
00800 00594 00641
01600 01099 01280
03200 02211 02518
06400 04211 05179
12800 08661 10084

To my understanding, D800 is more over stating high ISO number than 5d3.

Overcooking is not the right term. It just means that the d800 has more highlight headroom than the 5DIII. The DxO "ISO" is saturation based, which is not the same as film based ISO.

http://en.wikipedia.org/wiki/Film_speed

Scroll down to "Digital camera ISO speed and exposure index"

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Kind regards
Kaj
http://www.pbase.com/kaj_e
WSSA member #13

It's about time we started to take photography seriously and treat it as a hobby.- Elliott Erwitt

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