ISO & BS

[Andrew Allsbury]

I heard awhile back that the best way to black shade is:

- BS Current FPS/Exposure
- Maximum ISO

Is this the confirmed way to get best results?

Thanks!

 

[Kemalettin Sert]

afaik you can blackshade only @ 800 ISO

 

[Andrew Allsbury]

Ahhh, that's what I've been doing...but someone had mentioned that maximum iso was the best way to go...can anyone confirm it's 800 only?

 

[Kemalettin Sert]

yeah i can confirm you cant blackshade.at least i have tried many times on epic

 

[ericyoung]

Maximum ISO after black shading is just to check your Black Shade was good - it basically puts in maximum gain to show up any unevenness in your black frame. Blackshade should not be affected by ISO at all ( or rather, it doesn't matter if you blackshade at 800, or 320 whichI know you can. Higher speeds may not work due to bugs, but if they did, they still wouldn't affect Black Shading ).

 

[Tehben Dean]

What Eric said.

 

[Daniel Kunz]

when i read your title i thought you were mythbusting about ISO and other BullShit... haha

 

[Justin Talley]

As did I.

 

[PatrickFaith]

RED person explained somewhere (like there really should be a white paper on black shading) ... that after you black shade ... flip the iso to over to 10k ... to check that it worked right.

 

[George Butterfield]

page 55 of the Epic-X manual says ...
SECONDARY MENUS > SETTINGS > MAINTENANCE > CALIBRATION for complete details for performing a Black Shading Calibration
this is on page 134

I thought I "heard" somewhere to do the Black Shading at the highest ISO but I can't find this in the manual.

 

[Paramon Ivanovich]

here

 

[Uli Plank]

It's not about doing it at the highest ISO, but about checking it visually.

 

[TheBied]

ISO and Format do not affect the black shade process.

 

[Andrew Allsbury]

Thanks guys!

 

[Les C.]

ISO and Format do not affect the black shade process.

Any chance of an 'official' tech note from RED on the finer points of black shading?

There are lots of threads on this, but at times hard to separate the fact from fiction?

 

[TheBied]

Any chance of an 'official' tech note from RED on the finer points of black shading?

There are lots of threads on this, but at times hard to separate the fact from fiction?

Yes. I expect there will be an update to the explanation contained in the user manual or a separate technical paper describing the process in the future.

 

[Les C.]

ISO and Format do not affect the black shade process.

Is it true that it's based on shutter speed but not frame rate?

 

[TheBied]

Is it true that it's based on shutter speed but not frame rate?

Correct, you are calibrating for the shutter speed. The only reason to include frame rate in the equation is to allow for longer shutter speeds.