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SD15 Full Spectrum (no filter) WB comparisons

Started Jul 23, 2020 | Discussions thread
xpatUSA
OP xpatUSA Forum Pro • Posts: 23,016
Re: SD15 Full Spectrum (no filter) WB comparisons

tagscuderia wrote:

xpatUSA wrote:

tagscuderia wrote:

xpatUSA wrote:

I'd much rather blow highlights than suffer SPP's treatment of 'under' exposed Merrill shots − so I've learned to live with SPP's rather good Highlight Control tool. But I admire your sentiment.

We should remember the "S-curve" in DPR's dynamic range graphs - where the curve at the top means that highlights may not be "blown" but they certainly can have less contrast than desired.

The 'Standard' tone curve for the SD1M, not sure what to make of that really

Doesn't look like DPR's. Here is the DPR test 'S' curve which is sRGB 8-bit luminosity versus illuminance from a step-wedge target:

That's the conversion tone curve for Standard, found in the X3F metadata i.e. the correction curve. "If" SIGMA granted us access to that, we could define our own highlight roll-off.

Now I AM impressed! You dig far deeper than I - and I imagine that quite a bit of work went into that!

<DPR's test curve>

DPR have measured Dynamic Range though, so that's the classic S-curve post the correction curve that I've linked to... ? Gosh, my brain isn't working today.

What is/are the LUT/s captioned as in the metadata?

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