Calibrating Light Meter to a non-raw shooting camera (GH4)?

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cyjackx

Member
Just got a used Sekonic 758DR, and I want to calibrate it to my gh4; I've got a Delta Grey card and the setup, but if the GH4 only does RAW photos, does this mean that I have to use the video mode and be able to only calibrate it to a specific GH4 color profile? Or does calibrating it to the GH4's photo mode translate to video...?
 
GH4 does jpeg, but if it is like the GH2 then it has all sorts of funny effects it can apply too. Not sure if jpeg produces the same results as video mode though.
 
cyjackx said:
Just got a used Sekonic 758DR, and I want to calibrate it to my gh4; I've got a Delta Grey card and the setup, but if the GH4 only does RAW photos, does this mean that I have to use the video mode and be able to only calibrate it to a specific GH4 color profile? Or does calibrating it to the GH4's photo mode translate to video...?
Click to expand...

Uh?... What mode are you trying to calibrate... the still photo mode, or the motion picture mode?

I've not kept up on the GH-4. I have a GH-1, and I came to the conclusion that I needed to compensate about 1 stop to have 18% grey match the 50% IRE level on the Premiere video monitor display. Since the GH-1 only records in a Rec. 709 (-ish) way, that seemed reasonable.

For my Blackmagic Pocket Cinema Camera, I calibrate 18% grey card to be about 38% on the IRE display, when shooting in "BMDFilm" aka C-log (-ish) mode.

Once you choose where 18% falls on the IRE scale, then one determines how many stops over and under one has to determine the effective dynamic range. So, in the case of the GH-1, I found that I only had about a 1 3/4 stop over that before 'untextured' white, and about 3 stops under that before 'textured black'.

For the Pocket, I have about 3-4 over and 3 under. But then I am working in 'log' space.

I've also begun to shoot in Raw mode, which takes up more memory cards, but does allow for more dynamic range...
 
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