- Moderator
- #161
Brook Willard
REDuser Sponsor
- Joined
- Dec 28, 2006
- Messages
- 5,392
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- Age
- 41
- Location
- Burbank, CA
- Website
- www.brookwillard.com
As for ISO:
On a DSLR, your ISO floor is usally 100. You can go higher, but you'll get more noise. Generally [but not always], 100 is as low as you can go.
With RED, think of 320 ASA as your floor. You can go higher, but you'll get more noise. With RED, you *can* go lower [to get lower shadow noise by exposing more, as an example], but if you go *too* low, you start to clip highlights. You're shifting the same sensitivity window of the camera over... if you go too far, you'll clip.
Remember, there's always a chance I'm completely wrong... but this is my understanding. Thinking this way has helped me expose properly so far.
I don't really think of it in terms of ASA. I just expose as far to the right as possible with whatever my situation is. If my meter says to shoot at a 4.0 but I'm not filling the high end of my histogram... screw it - I'm opening up more. If it says to shoot at a 4.0 but I'm clipping highlights... I'm stopping down.
Just don't forget your NDs. And get GOOD ND filters - if you have to stack [or use a very dense ND], you'll have to deal with a color shift and contrast loss. Not that you won't be able to save it in post... but smoke 'em if you got 'em.
On a DSLR, your ISO floor is usally 100. You can go higher, but you'll get more noise. Generally [but not always], 100 is as low as you can go.
With RED, think of 320 ASA as your floor. You can go higher, but you'll get more noise. With RED, you *can* go lower [to get lower shadow noise by exposing more, as an example], but if you go *too* low, you start to clip highlights. You're shifting the same sensitivity window of the camera over... if you go too far, you'll clip.
Remember, there's always a chance I'm completely wrong... but this is my understanding. Thinking this way has helped me expose properly so far.
I don't really think of it in terms of ASA. I just expose as far to the right as possible with whatever my situation is. If my meter says to shoot at a 4.0 but I'm not filling the high end of my histogram... screw it - I'm opening up more. If it says to shoot at a 4.0 but I'm clipping highlights... I'm stopping down.
Just don't forget your NDs. And get GOOD ND filters - if you have to stack [or use a very dense ND], you'll have to deal with a color shift and contrast loss. Not that you won't be able to save it in post... but smoke 'em if you got 'em.