PDA

View Full Version : Iso 320 vs iso >800


Vigen Vartanov
11-01-2008, 02:43 PM
Good day , i have 1 shoot that i take with iso 800 . Then in RedCine i change it to 320 . But Picture looks very different from same shoots shoot on 320 ISO . I now that ISO is Metadate but
Will Shoot with 800 (RedCine to 320 ) = Shoot 320 ISO . Or i will get some difference .
Deanan
11-01-2008, 03:02 PM
Exactly the same.
Vigen Vartanov
11-01-2008, 03:03 PM
Thanks.:sad:
Harry Capota
11-01-2008, 03:04 PM
of course its metadata and of course you will have a difference!
when chossing iso 800 you expose looking at 800. and when shooting at 320 you expose to 320 thats all.
Joel Kaye
11-01-2008, 03:06 PM
Good day , i have 1 shoot that i take with iso 800 . Then in RedCine i change it to 320 . But Picture looks very different from same shoots shoot on 320 ISO . I now that ISO is Metadate but
Will Shoot with 800 (RedCine to 320 ) = Shoot 320 ISO . Or i will get some difference .
There's really no advantage to shooting ISO 800 other than seeing it brighter on the screen while you're shooting. You'll likely just underexpose the image more than needed.

If you shoot ISO 800 then change to 320 in RedCine the software is simply making it darker (probably with a curved gamma shift). If you shoot 2 shots back to back -->at the same aperture<-- one at 800 and one at 320 they would both look the same in RedCine when metadata and curves are removed.
Dalibor Fencl
11-01-2008, 04:58 PM
There's really no advantage to shooting ISO 800 other than seeing it brighter on the screen while you're shooting. You'll likely just underexpose the image more than needed.

If you shoot ISO 800 then change to 320 in RedCine the software is simply making it darker (probably with a curved gamma shift). If you shoot 2 shots back to back -->at the same aperture<-- one at 800 and one at 320 they would both look the same in RedCine when metadata and curves are removed.

-->at the same aperture<-- that's the magic sentence

I'm afraid most folk here don't understand it that way and shooting with ISO 800 means for them they accomodate the apreture so they can see it "properly" on a display. Hence the footage is one and half f/stop underexposed and naturally DIFFERENT. In other words: highlights are cut - forever.