Please explain for me...

[nguyenduy]

I read on the red guide book that the color temp, ASA, shutter are not influence the RAW file. Is It right?
Thanks for your help.

 

[Raul Gonzo]

The color temp is natively set to 5000k and the ASA to 320.
Not certain about the shutter...

 

[Rob van Gelder]

Well, you need to read more carefully:

Yes, the RAW file is not influenced by most of the settings, but it IS influenced by the SHUTTER, the RESOLUTION, and the REDCODE option.

(Actually, the shutter is not really doing anything to the RAW file, but it does change the characteristic of every frame IN the raw file)

Did I forget anything?

All adjustments that you can make in color temperature, iso, viewing mode and applied look are only METADATA, giving any RED-software program an indication how you would like to see the files.
But the files are still the same (RAW) and will be like that forever whatever you do in other programs.

So you can view it "as if" it was 3200 K or 1000 ASA, but the real image is still recorded with a chip that is (in my experience) 250 ISO and 5000 K, whatever you shoot with it.

Please think of most settings as an electronic version of a filter or high/low speed film.


Rob

 

[Stephen Gentle]

Rob is correct, but I thought I'd just try to give some background for anybody who isn't familiar with this.

Most cameras will apply gamma correction, digital gain, white balance adjustments and so on to the data that they get off the sensor in the camera, and then they usually pull some of the colour information out of the image (stuff you can't see normally, but you really want to pull a good chroma key, or do various other adjustments in post). This completely altered data is then compressed and saved to the media you're shooting on. That means that if you set the white balance wrong, for example, you have to correct it in post, which will usually make the image far noisier that if you had done it in the camera.

The RED ONE, on the other hand, doesn't do this. Just like most digital SLRs are able to, it records the raw data from the sensor, using wavelet compression to keep the file sizes down with few visible compression artefacts. Now, the raw image looks pretty flat and boring (interestingly enough, the more dynamic range an image has, the flatter it looks), and it may not be suitable for monitoring - say if you needed to push up the iso or change the white balance. The RED ONE can do these manipulations to the data, and show it on the monitor, but it still saves just the raw data, along with these instructions on the side (as meta data). So when you take the image into a processing application, it will look like it did on the monitors, but you can completely adjust most of the properties without the quality loss you would get on an already processed image.

Just remember that like Rob said, there are some things (shutter speed, frame rate, resolution and most of all, the exposure) that are burnt into the image and if you mess them up, you're stuck with it.

 

[nguyenduy]

Thanks for your help