Lumolab Pentax K-7 vs. K-x - falklumo
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Signal to noise ratio (SNR) for the Pentax K-7 and K-x. Full measurement for various luminosities and ISO settings at color temperature 2900°K. Measurement similiar to dxomark.com. The dotted lines indicate the slope for pure photon shot noise. The flattening at 30% gray and brighter is believed to be due to systematic measurement errors like imperfect gray patches.
The curve for K-7 only and test images are at:
http://falklumo.smugmug.com/Photography/Pentax-K-7/Lumolab-K7/10103433_4JwvW/1/693823624_aA6Fd
The curve for K-x only and test images are at:
http://falklumo.smugmug.com/Photography/Pentax-K-x/Lumolab-Kx/10103582_LRh2Y/1/693829277_tzsR9

Signal to noise ratio (SNR) for the Pentax K-7 and K-x. Full measurement for various luminosities and ISO settings at color temperature 2900°K. Measurement similiar to dxomark.com. The dotted lines indicate the slope for pure photon shot noise. The flattening at 30% gray and brighter is believed to be due to systematic measurement errors like imperfect gray patches.
The curve for K-7 only and test images are at:
http://falklumo.smugmug.com/Photography/Pentax-K-7/Lumolab-K7/10103433_4JwvW/1/693823624_aA6Fd
The curve for K-x only and test images are at:
http://falklumo.smugmug.com/Photography/Pentax-K-x/Lumolab-Kx/10103582_LRh2Y/1/693829277_tzsR9

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