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Papilio ulysses
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Guppy



Joined: 20 Dec 2010
Posts: 102
Location: Switzerland

PostPosted: Tue Mar 24, 2020 10:08 am    Post subject: Reply with quote

Hi Chris, hi Marco

Yes, sorry I made a mistake, the correct histogram in RawDigger looks like this:



Kurt
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rjlittlefield
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Joined: 01 Aug 2006
Posts: 20641
Location: Richland, Washington State, USA

PostPosted: Tue Mar 24, 2020 11:45 am    Post subject: Reply with quote

Ah, OK.

So, you're leaving quite a lot of extra space on the right, about 2 1/2 stops?

--Rik
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Guppy



Joined: 20 Dec 2010
Posts: 102
Location: Switzerland

PostPosted: Tue Mar 24, 2020 1:35 pm    Post subject: Reply with quote

Hi Rik

I wanted to keep the flash-burn time short.
An underexposure in RAW format is not tragic.
The noise of a Nikon D810 can be removed very easily at 60:1.
I could have also increased the ISO number.

Kurt
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rjlittlefield
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Joined: 01 Aug 2006
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Location: Richland, Washington State, USA

PostPosted: Tue Mar 24, 2020 2:17 pm    Post subject: Reply with quote

Guppy wrote:

I wanted to keep the flash-burn time short.
An underexposure in RAW format is not tragic.
The noise of a Nikon D810 can be removed very easily at 60:1.
I could have also increased the ISO number.

Understood, makes perfect sense.

The D810 falls into the category of cameras that is called "ISO invariant". This means that noise levels are the same regardless of whether you increase the ISO or shoot at low ISO as raw and then levels-shift to make up the difference.

See https://improvephotography.com/34818/iso-invariance/ for discussion.

--Rik
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Guppy



Joined: 20 Dec 2010
Posts: 102
Location: Switzerland

PostPosted: Wed Mar 25, 2020 2:11 am    Post subject: Reply with quote

Hi Rik

(The D810 falls into the category of cameras that is called "ISO invariant")
There is a lot of writing, I measured it myself years ago up to ISO 2000, it is indeed so. Very Happy
In my comparison, a subsequent brightening was minimally better from ISO 500 on, like higher ISO numbers.

An important difference with Focus Stacking.
If you choose a higher ISO number, there is the possibility of overexposure.
If the pictures are a little too dark, you can adjust the brightness after stacking (Zerene).

Kurt
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marcojongsma



Joined: 22 Feb 2019
Posts: 15

PostPosted: Tue Apr 14, 2020 2:25 am    Post subject: Reply with quote

Guppy wrote:
Hi Chris, hi Marco

Yes, sorry I made a mistake, the correct histogram in RawDigger looks like this:



Kurt


Thank you so much Guppy now i now a little bit more you make the stack in raw so you can post processing it more if it is possible too show us the unedit version or a single shot regards marco
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Guppy



Joined: 20 Dec 2010
Posts: 102
Location: Switzerland

PostPosted: Thu Apr 16, 2020 7:52 am    Post subject: Reply with quote

Hi Marco

Here is the unprocessed image.


Kurt
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marcojongsma



Joined: 22 Feb 2019
Posts: 15

PostPosted: Fri Apr 17, 2020 3:41 am    Post subject: Reply with quote

Guppy wrote:
Hi Marco

Here is the unprocessed image.


Kurt


Thank you so much for sharing your experience Guppy
it gives me more details about the process and lighting
i will do some new tests this week and change something about my workflow.
i post the results soon here

ps also the pictures on your website are beautyfull

regards marco
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