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Completely RAW data file & RGB Numbers

Sean1
I'm shooting a very specific green screen set up where I need my green screen RGB #'s to be exactly G217. Thing is, Capture One seems to change the numbers around. I can't seem to access the RAW exposure data from the RAW file. When I shoot using Canon's tethered software I get a clean green 217 all even as I've lit it. But Capture One puts a curve or something on it; I get hot spots almost center weighted. I've used C1 since v3 and think I'm pretty good about understanding how it works I've checked to make sure profiles weren't applied and that styles weren't applied. How can I shoot using C1 and see EXACTLY the native file #'s in the RAW file data? I've been told that C1 does this compensation with exposure that's built into the software. Would seem very strange for professional software to do this.

Equip: Eizo / Gretag calibrated monitor. P25 and Canon 1DsMk2 to C1 v6. Profoto 8a. Proprietary green screen surface chroma keyed to +/- .5%.

Thanks for any help on this.
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  • Drew Altdo
    [quote="Sean1" wrote:
    I've been told that C1 does this compensation with exposure that's built into the software. Would seem very strange for professional software to do this.


    Sean,
    The two softwares, Capture One and Canon DPP, are very different. Capture One applies default adjustments to the image based on the ISO (noise reduction) as well as default sharpening and our own Canon ICC profile. You can reset those adjustments as well as set the ICC profile to something you find more suitable. If you need help making these changes create a support case and provide the file, we'll have a closer look and get back to you with the best course of action.
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  • Sean1
    Hi Drew. Thanks for your reply. So there's no way to turn all of these to default and just look at an uncorrected / non-ICC-applied / non-profile-adjusted image? Are those adjustments only found in the .cos files? None of those are embedded into the TIF or IIQ date, correct? I could continue to let C1 control the camera tethered and use alternate software for non-applied view of what the camera is capturing. You understand my conundrum, yes? I'm aligning an specific image on set with lighting that's extremely specific and I need to see that on screen (in the numbers) without alteration. If not, can you recommend a method that allows me to use my P25 tethered and software that doesn't correct? Thanks much...
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  • Drew Altdo
    [quote="Sean1" wrote:
    So there's no way to turn all of these to default and just look at an uncorrected / non-ICC-applied / non-profile-adjusted image?

    - Well...? Not really. Every image in any software is going to have some interpretation of the RAW data, including some type of ICC profile. Perhaps the better question is "Can I preview the file in Capture One as it is in Canon DPP?" and the answer to that is, likely. Create a support case and lets have a look at a specific file.

    [quote="Sean1" wrote:
    ...None of those are embedded into the TIF or IIQ date, correct?

    -NO WAY! Capture One is READ ONLY, which means we don't alter the RAW. All adjustments to the RAW are saved in the sidecar COS file.

    [quote="Sean1" wrote:
    I could continue to let C1 control the camera tethered and use alternate software for non-applied view of what the camera is capturing.

    -Again, lets have a specific look at a file in a support case. You want a "non-applied view" but we really need to figure out what you mean by that, as any software that you look at your files in will have some type of "applied view".

    [quote="Sean1" wrote:
    ... can you recommend a method that allows me to use my P25 tethered and software that doesn't correct? Thanks much...

    -Start with a support case and we'll go from there.
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