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Old November 14th, 2016, 10:45 PM   #1
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Join Date: Sep 2013
Location: Melbourne, Australia
Posts: 14
HXR-NX5R Color Setup / Issues?

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I've bought one of the new HXR-NX5R cameras, having had an HXR-NX5P for some years. The original NX5 was set up with the Picture Profile Michael Johnston posted here some years back, a good setup that I was happy with, and never really messed with beyond that. I set the new camera up with basically the same settings.

Second time out filming an actual show, I hit a bit of a horror scenario with a silver reflective curtain, in combination with a purple light (LED lighting). The stills below tell the story, there are 6 frames showing various colour washes, frames 1 & 6 are a good clean representation of what the curtain actually looked like, frame 4 into frame 5 shows the result when the purple light came up.


As you can see in frame 5 in particular, the detail has been lost into a block of solid colour, on top of which it is somehow blue - the curtain should me a metallic purple at this point! With plenty of detail!

On the old NX5, getting purple as blue was usually a white balance issue (for me anyway), and fixed by dialling in the correct manual WB Temp. I tried adjustments to this during the show, but couldn't get any improvement here. I did some reading up immediately after the show, and as best as I could determine, purple light up towards UV is not necessarily handled well by some sensors. So at this point I'm thinking it is a sensor issue, and was intending to jump on here and ask you guys for any helpful suggestions.

Before I get a chance to do that, I have to film another show, and here we go, purple LED lighting again. So in the next show, I get this:


The girl at the top of the frame in the whiter light, shows what the skirt should look like. Compare that with the girl lower left, whose skirt is blended to the floor. It did NOT look like this live, the detail was visible, on top of which it should have again been purple, not blue. A really poor result, which there's nothing I can do about fixing it in the edit - the detail is lost.

This concert had 2 shows, and between them I was able to run some tests with the lighting guy on the problematic light. After playing with various settings, it turns out that changing the Color Mode improves what is going on. I had the color mode set to ITU709, as per the original camera/profile. If I set the camera to Standard (better), and then Cinematone 2 (best), you can see the difference.


My best guess at this point, is that these lights are putting out UV along with the purple, which our eyes can't really see, but the camera does. I thought that the Color Mode setting really just affected the color palette of the final image, but it seems it's altering how the image is captured here as well, possibly at the sensor level. I don't otherwise understand enough about the relationship between this setting and what the sensor is doing, if anyone has any pointers to any further info on this, or other suggestions to try, I'd be most interested.

Other than that, hopefully at least others out there with the camera see this and can learn from my experience, before ending up with any images looking the same!
Peter Barton is offline   Reply

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