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  • Hey all, just changed over the backend after 15 years I figured time to give it a bit of an update, its probably gonna be a bit weird for most of you and i am sure there is a few bugs to work out but it should kinda work the same as before... hopefully :)

ISO... today

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so russia?..
 
So Jarred,

When you're hanging out with a billionaire having lunch or whatever and the bill comes, do you even feign like you're going for your wallet?
 
Hi Jarred,

I know other things are more important right now but how far are we away from speed ramping with shutter compensation on Red-One?
 
Jarred Land said:
I am actually in Chicago right now on Wanted.. but ask that question again in a day or two and it's likely to change.
Click to expand...

i will.. ehehehe..

car-smiley-005.gif
enjoy it man..
costumed-smiley-034.gif


if you'll be over here, say something on the way.. to take a look on re.. ooops.. on you.. red can wait.. :)
 
Jannard said:
Today, we believe the RED ONE camera should be rated at ISO 500.
Jim
Click to expand...

This question may have been asked before, so I apologize in advance if it has:

Will there be a gain adjustment? If so, can we set the gain at a minus number? I would love to be able to set -12db or lower in certain situations..

Thanks,
Phil

www.artbeats.com
 
Phil Bates said:
This question may have been asked before, so I apologize in advance if it has:

Will there be a gain adjustment? If so, can we set the gain at a minus number? I would love to be able to set -12db or lower in certain situations..

Thanks,
Phil

www.artbeats.com
Click to expand...


Yes, there is a Gain adjustment measured in 3dB steps available. That affects the RGB recordings, video outputs and EVF feed. When recording RAW the value is stored as metadata, so you can use this value for gain in post, or ignore it - your choice.

Stuart English
7/1/07
RED User
http://www.reduser.net/forum/showthread.php?t=3039&page=2



In the same way that you can push a filmstock, you can adjust gain when "developing" RAW into RGB.

The visual result is similar - a brighter image but an increased noise floor.

Stuart English
(later in same thread)


If you record REDCODE RGB then any Gain selected is applied prior to compression i.e its already affecting the RGB image the camera records. If you record REDCODE RAW, then Gain is just stored as metadata, and it is then used (or not, as its your choice) in the conversion of 12 bit RAW to 10 bit or 8 bit RGB / 4:2:2 in post production.

Stuart English
(later in same thread)



There's an electronic gain in the RGB pathway, so, if you shoot 5 stops under, you just put the EV compensation +5.0EV.

Graeme Nattress
7/13/07
RED User
http://www.reduser.net/forum/showthread.php?p=58225&posted=1#post58225


What it means, is that, all things being equal, you can under-expose a shot by 5 stops (8000ISO to 250ISO is 5 stops) and "get away with it".

Graeme Nattress
7/14/07
RED User
http://www.reduser.net/forum/showthread.php?t=3222


I think RGB gain is in 10th stop increments. It certainly is in the REDCINE decode, which is what we're doing.

Remember, this is all without noise reduction, which you could always apply if you want.

Graeme Nattress
7/15/07
RED User
http://www.reduser.net/forum/showthread.php?t=3235&page=8



The RGB monitoring pathway runs on the same image processing code as REDCINE, so you'd dial in +3.0EV if you rate the camera at 250 but are wanting to see it at 2000. This gets stored in the metadata.

Graeme Nattress
(later in same thread)



There's two things - analogue sensor gain ahead of the A-to-D, and digital gain, which occurs post digitisation. Both are useful.

What we're doing in these tests is to show that if you under expose, and gain up in post (ie digital gain) what results you get.

Graeme Nattress
7/17/07
RED User
http://www.reduser.net/forum/showthread.php?t=3235&page=11
 
Wow, that is amazing! When Phil posted that question I was thinking to myself, where's Gibby and his mad search skillz when you need him?

Then, BAM, a couple minutes later there he is with the answers as usual. Very impressive Gibby. Thank you.
 
Gibby said:
Yes, there is a Gain adjustment measured in 3dB steps available. That affects the RGB recordings, video outputs and EVF feed. When recording RAW the value is stored as metadata, so you can use this value for gain in post, or ignore it - your choice.

Stuart English
7/1/07
RED User
http://www.reduser.net/forum/showthread.php?t=3039&page=2



In the same way that you can push a filmstock, you can adjust gain when "developing" RAW into RGB.

The visual result is similar - a brighter image but an increased noise floor.

Stuart English
(later in same thread)


If you record REDCODE RGB then any Gain selected is applied prior to compression i.e its already affecting the RGB image the camera records. If you record REDCODE RAW, then Gain is just stored as metadata, and it is then used (or not, as its your choice) in the conversion of 12 bit RAW to 10 bit or 8 bit RGB / 4:2:2 in post production.

Stuart English
(later in same thread)



There's an electronic gain in the RGB pathway, so, if you shoot 5 stops under, you just put the EV compensation +5.0EV.

Graeme Nattress
7/13/07
RED User
http://www.reduser.net/forum/showthread.php?p=58225&posted=1#post58225


What it means, is that, all things being equal, you can under-expose a shot by 5 stops (8000ISO to 250ISO is 5 stops) and "get away with it".

Graeme Nattress
7/14/07
RED User
http://www.reduser.net/forum/showthread.php?t=3222


I think RGB gain is in 10th stop increments. It certainly is in the REDCINE decode, which is what we're doing.

Remember, this is all without noise reduction, which you could always apply if you want.

Graeme Nattress
7/15/07
RED User
http://www.reduser.net/forum/showthread.php?t=3235&page=8



The RGB monitoring pathway runs on the same image processing code as REDCINE, so you'd dial in +3.0EV if you rate the camera at 250 but are wanting to see it at 2000. This gets stored in the metadata.

Graeme Nattress
(later in same thread)



There's two things - analogue sensor gain ahead of the A-to-D, and digital gain, which occurs post digitisation. Both are useful.

What we're doing in these tests is to show that if you under expose, and gain up in post (ie digital gain) what results you get.

Graeme Nattress
7/17/07
RED User
http://www.reduser.net/forum/showthread.php?t=3235&page=11
Click to expand...

Dude, you better give the Gibster a soild thanks for the research!!!

That is a helluva archive you got there sir..!!!!!

or is it all just swimming around in your head..
 
LOL...! I simply did a copy/paste from the "Gain" file in my own archive on RED that I've maintained over all these months of RED development. Since RED was announced 20 months ago I've been keeping a running archive categorized by subject matter. My archive goes way beyond RED subjects - many other areas of technology in the motion media industry. I like research, plus the archive helps me when I write tech magazine articles. I loved research in college while I was working on my degree...and simply kept the habit going since then.

I'm always happy to help when I can by dippin' into my archive... :biggrin:
 
Negative values though, are not possible (or useful). You can underexpose and increase the gain (increasing also the noise) but you can't burn the highlights and then use a negative gain to bring them back.

An analogy would be the use of a microphone. If you overdrive the microphone (the sensor) and the sound starts distorting or clipping the peaks, you can't restore them by lowering the input gain on the recorder.
 
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