D200 vs D70 Dynamic Range graph

Started Jan 30, 2006 | Discussions thread
Asaf Tzadok Regular Member • Posts: 134
Re: Raw numbers (0-4096) as promised

Bill Janes wrote:

Asaf Tzadok wrote:

Thanks to davexl for providing the NEF files.
I was able to calculate the average raw number for each file.
I hope davexl will be able to use it in order to get more reliable
numbers.

The numbers are as follows:
(Filename EV R G B G)

D2A2051.NEF -5.0 20 20 39 20 D2A2050.NEF -4.7 23 24 22 24
D2A2049.NEF -4.3 34 34 11 34 D2A2048.NEF -4.0 38 38 12 38
D2A2047.NEF -3.7 47 48 15 49 D2A2045.NEF -3.3 58 58 18 59
D2A2043.NEF -3.0 75 75 25 76 D2A2042.NEF -2.0 170 171 55 173
D2A2041.NEF -1.0 285 286 93 289 D2A2034.NEF 0.0 546 556 186 561
D2A2035.NEF +1.0 1097 1113 370 1123 D2A2036.NEF +2.0 2193 2211 727 2224
D2A2037.NEF +2.3 3011 3034 996 3052 D2A2038.NEF +2.7 3534 3549 1159 3569
D2A2039.NEF +3.0 4090 4086 1528 4090 D2A2040.NEF +3.3 4090 4086 1928 4090

As you can see the saturation point is at +3.0EV.
The blue channel is no reliable under -4.0EV, for some reason it
gets brighter.

Best Regards,
Asaf.

Asaf,

Interesting results. How did you obtain these values?
--
Bill Janes

Bill,

These numbers are a result of averaging the raw data each pixel.

I had to add some code to the dcraw to do the calculation before any multiplication/manipulation.

Regards,
Asaf.

 Asaf Tzadok's gear list:Asaf Tzadok's gear list
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