E-5 Raw noise performance = E-30/ ballpark E-3's

Started Dec 18, 2010 | Discussions thread
bobn2
bobn2 Forum Pro • Posts: 61,427
Re: Look at this

luisflorit wrote:

Look at this comparison between JPG and RAW exposures:

I can't see what the exposure is from these - they are processed shots and the tonality depends entirely on the tone mapping (in the broad sense - mapping of output tones to recorded light values) that has been applied.

As you see, they have essentially the same exposure, but the RAW file was pushed by 1.2 stops.

Is the EXIF in there, then at least I can look at the settings and see if the exposure is the same (assuming that the light is the same)

There are other manufacturers that decided to do this also. It seems that the D7000 does this to the highest degree. The point is that this makes perfect sense when the sensor has very low read noise (like the D7000). If not, then you are buying big trouble.

I'm not sure what you think has been done. The D7000 seems on first sight to rely exclusively on digital tone mapping for the whole range of exposure values it can be set for. The K-5, which uses the same sensor, retains some analog gain variation over the range. Which is used is really only of interest to geeks like me, for the photographer the issue is the quality of the output, and the manufacturer will have chosen the balance between digital and analog tone mapping to get what they think is the best advantage. I don't think they're always right in their choices.

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Bob

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