Originally posted by DragonLord This just isn't true. The K-5 has very low read noise, much lower than the K200D. The DxOMark score of 82 and tested dynamic range of 14 stops cannot be explained otherwise.
--DragonLord
MUCH LOWER?
The shadow noise is important for DR of DSLR.
SNR18% - is ratio signal/noise for average gray scale (18%). Almost clear shadows.
DR of K-5 is better if we use SNR18%. If we really shoot in bad condition - SNR18% is useless. We should look at data of 50-100%.
Let's have a look at K-5 and K200D at full SNR - it's very interesting:
gray scale at ISO100.
30%: K-5 - 39.8 dB, K200D - 39.1 dB
40%: K-5 - 40.9 dB, K200D - 40.3 dB
50%: K-5 - 41.7 dB, K200D - 41.2 dB
60%: K-5 - 42.4 dB, K200D - 42 dB
70%: K-5 - 42.9 dB, K200D - 42.6 dB
80%: K-5 -
43.3 dB, K200D -
43.1 dB
90%: K-5 -
43.7 dB, K200D -
43.6 dB
100%: K-5 -
44 dB, K200D -
44 dB
We can see that the difference in shadows are almost negligible. Not higher than 1%.
But very interesting results for higher ISO...
IS800
90%: K-5 - 35.6 dB, K200D - 36.1 dB
100%: K-5 - 36.1 dB, K200D - 36.5 dB
(and K200D is a bit better at ISO800 in shadows at all points)
ISO1600
90%: K-5 - 33.1 dB, K200D - 33.4 dB
100%: K-5 - 33.5 dB, K200D - 33.9 dB
K-5 is better at ISO80 with 3% better result. K200D has no ISO80.
But...at ISO100-400 - almost no any serious difference. K-5 is a bit better.
at ISO800-1600 are the same situation, but K200D is a bit better.