[argyllcms] AW: Re: AW: Re: CCT of a Speedlight
- From: "Andreas Mock" <andreas.mock@xxxxxx>
- To: <argyllcms@xxxxxxxxxxxxx>
- Date: Tue, 13 Jul 2021 23:00:31 +0200
Hi Martin,
thank you for clarification.
Best regards
Andreas
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Von: argyllcms-bounce@xxxxxxxxxxxxx <argyllcms-bounce@xxxxxxxxxxxxx> Im Auftrag
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Gesendet: Dienstag, 13. Juli 2021 22:58
An: argyllcms@xxxxxxxxxxxxx
Betreff: [argyllcms] Re: AW: Re: CCT of a Speedlight
On 13 Jul 2021, at 19:36, Andreas Mock <andreas.mock@xxxxxx> wrote:
would you be so kind to explain how you measured your speed light?
I'm interested in that thread as I also really often had the effect
that setting the white balance with a greycard lit by flash led to
high Kelvin values far away of what I expected.
Hi Andreas
I have the i1Pro2 connected to ArgyllPRO ColorMeter, set to Ambient and facing
the flash in a dark room.
I click Measure and then fire the flash and then check the spectral chart.
Just done the same thing with a Nikon SB900 Speedlight and got very similar
results — although I think I misread the plots for the Metz results… there are
peaks, not troughs.
At high power I get the expected plot.
At low power I misread a dip at 510 when it is more likely to be two peaks at
490 and 530.
This could still be caused by something in the room including me, my clothing
or dim glow from tablet I suppose? But working at 1/128th power, I’ve got the
Speedlight just a few cm away from the ambient cover on the i1Pro2.
You don’t need Argyll’s ColorMeter though, you can get all the i1Pros from
Revision D onwards to capture flash spectra from the command line using Argyll.
--
Martin Orpen
Idea Digital Imaging Ltd
Other related posts:
- » [argyllcms] AW: Re: AW: Re: CCT of a Speedlight - Andreas Mock
