Sekonic L-758c Profile for Red One

[Ryan E. Walters]

So I got my camera last week and set out to profile it with my Sekonic L-758c. After a full day of shooting, a day of processing, and some time making the profiles I thought that i would share what I came up with.

For more details and specifics on the testing visit my blog:
Ryan's Blog

Direct Link to Blog Post:
Profiling the Sekonic L-758c

Download the profiles here:
Sekonic Profiles for the Red One (Build 17)

I was very surprised by the results- the biggest factor in determining the latitude was the color space and not light color temp of the lighting source. (At least from a technical standpoint as evaluated by the software.) You're own acceptable tolerance for the noise floor my not match up with what the software calculated.

The RAW settings had the greatest range of just over 9 stops. Next was Rec709 with just under 8 stops, and then RedSpace came in at just under 7 stops. (These were the three settings that I processed, as they are the ones that I am most interested in. With each color space there was about 75 images that needed to be processed....)

Also in the profile download link above you will find a PDF that details out the settings used, all of the profiles created, and comparison charts of the various settings.

[Kwan Khan]

Interesting
Thanks Walters

[Jean Déraps]

Hey Ryan, thanks for the info. I have the Sekonic 758 cine...I'll have a look at your data and profiles!

[Vigen Vartanov]

Thanks. I want to do it :) but first i need to buy chart as in Video .
It is good idea .

[Ryan E. Walters]

No problem, always glad to contribute to the community. :)

[Miguel "Macgregor" De Olaso]

Hi, could you explain exactly what you did to get those figures in RAW, 709 and redspace? Where did you see the results? Redcine? Redalert? Scratch? HDsdi? What iso did you have on your camera for the tests?

[Ryan E. Walters]

All of the specifics are outlined in the PDF that I included with the profile download which you can access here: Sekonic Profiles

In regards to work flow- I was able to shoot tests from an ASA of 200 to 1000 using both tungsten and HMI lights. The Sekonic software then took these results from each ASA and lighting situation and made them into one profile (one per light source and per color space). To see the individual results of each ASA you can load the profile into the Sekonic software and choose a corresponding ASA.

After shooting the images, I processed out stills via Red Alert. (The settings of which are contained in the above download. Check out the PDF & profiles as they should help clear up your questions.

[Shawn Booth]

Thank you Mr. Walters.