Michael Blieden
Well-known member
I've narrowed down my question to this...does anyone have a standard RGB value for middle grey that they like? This is a different way to ask the same thing - does Red have a standard IRE value for middle grey that I can use as a jumping off point or is up to your preference/color correction tastes?
I've been trying to calibrate my Dragon (SKH OLPF) to my Sekonic L758c, and there's something I'm struggling with. The profile I've created generates an incident reading that's about a stop and a half too high, thereby leading to underexposure. I keep thinking it has something to do with the mid tone value I've entered, but I'm just guessing. Below is a download link to an R3D trim of the exposure that I'm basing my mid tone on. The R3D will load with Redgamma4 but I exported it in Redlogfilm to make the jpeg for the Sekonic software.
http://we.tl/jfpG3V0se0
What you are looking at is ISO 400/24fps/270degree/f2.0/ND. 1.2 (-4 exposure value)8 AND 0/10 incident reading
5.6 and 2/10 spot reading
I created a Sekonic profile based on log exports of this and my over/under exposures as well. Photoshop gives me an RGB value of 79 for chip 13 off this exposure, so that's what my profile is based on. Is that too low of a value for the mid tone? If I meter using the Default camera profile on the Sekonic I get accurate exposures and the Default uses a mid tone RGB value of 118. So that's what makes me think that my value of 79 is throwing the calibration off.
Best,
Blieden
I've been trying to calibrate my Dragon (SKH OLPF) to my Sekonic L758c, and there's something I'm struggling with. The profile I've created generates an incident reading that's about a stop and a half too high, thereby leading to underexposure. I keep thinking it has something to do with the mid tone value I've entered, but I'm just guessing. Below is a download link to an R3D trim of the exposure that I'm basing my mid tone on. The R3D will load with Redgamma4 but I exported it in Redlogfilm to make the jpeg for the Sekonic software.
http://we.tl/jfpG3V0se0
What you are looking at is ISO 400/24fps/270degree/f2.0/ND. 1.2 (-4 exposure value)8 AND 0/10 incident reading
5.6 and 2/10 spot reading
I created a Sekonic profile based on log exports of this and my over/under exposures as well. Photoshop gives me an RGB value of 79 for chip 13 off this exposure, so that's what my profile is based on. Is that too low of a value for the mid tone? If I meter using the Default camera profile on the Sekonic I get accurate exposures and the Default uses a mid tone RGB value of 118. So that's what makes me think that my value of 79 is throwing the calibration off.
Best,
Blieden
Last edited: