D7100 'streaking'

Started Apr 7, 2013 | Discussions thread
Jack Hogan
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Re: D7100 'streaking' - doesn't look like blooming or flare
In reply to krikman, Apr 9, 2013

krikman, you have suggested that the streaking we see could be due to signal processing before the data is written to the Raw file.  I agree that it could be one of the reasons and said so in a previous post.

Unfortunately in the process you have gone off and made a number of unsubstantiated claims that are, imo, misleading and highly unlikely at best.  Rather than waste keystrokes challenging all of them, let's concentrate on the grandest, this one (I have highlighted it in bold and underlined it):

krikman wrote:

Jack Hogan wrote:

But VERY IMPORTANT DISCOVERY:

Until ISO400 we presumable have clear raw data, but from ISO800 Nikon 'cooks' RAW data by different datapath with intensive onchip (?) NR. It is common sense but first time we had clear instrumental proving.

Can you provide details on your analysis and the data to support your claim?

You've already seen it on pictures.

I have seen no such thing.   In fact I have checked : the D7100's full SNR curves do not appear to show intensive (or any) noise reduction at ISO800 or 1600 in the Raw data.  Perhaps I will see differently once you share how you arrived at that conclusion and the data that drew you to it.  Without this additional information, though, yours remains an unfounded, far-fetched claim without 'clear instrumental proving'.

Cheers,
Jack

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