The ISO thing with Red cameras. How does it work on a non-RAW-HDSLR?

[Thomas Koba]

I understand the 320/800 ISO thing with these cameras (protecting highlight vs. noise in blacks). But how do other non-RAW-cameras manage this? Like the Canon HDSLR? When you change ISO to 100 on them, are the sensors overexposing, when using onboard histograms...like on the would on a Red?

I would suppose that that the issue would be exactly the same, except that Canon people "don't yet know of the problem"?

Should I manage ISO in the same manner when using my Canon 5D, with ND's? Or should I not be afraid of going down to 50 ISO?

 

[Max M.]

I know that with the c300 the base ISO is 850 and going lower is having less stops of latitude in the image, above seems to be less of a problem, don't know how it is with a dslr.

 

[Logan Gee]

You always want to shoot in multiples of 160 on Canon DSLRs. It's a digital pull in noise from 200, 400, 800, etc.

They look cleaner.

Also, the native C300 iso is 640.

 

[Mike P.]

I think other cameras have built-in noise reduction to manage noise better at the cost of dynamic range reduction. Also, with baked-in images, I tend to protect my highlights more conservatively knowing I can pull stuff out of the blacks and knowing that the highlight roll-off isn't as nice as RED's.

The reason that shooting at a higher ISO works with RAW is that it causes you to stop-down or increase shutter (physical exposure settings) on location to prevent over-exposure. Then, in post you can decrease ISO, FLUT, or use a curve, to give an even smoother highlight roll-off as you've already ensured nothing is blown out. With cameras that bake-in the image, you don't have that ability in post to "re-expose" via ISO adjustments (or at least, it's not as accurate or as adjustable as RAW), so raising the ISO to protect the highlights wouldn't really work. In other words, with baked-in image data, whether you darken an image shot at 100ISO or 800ISO, you're going to have the same results with roll-off and highlights looking and reacting to the adjustments exactly the same at either ISO.

So, no, it doesn't work the same with other cameras.

 

[Logan Gee]

Also, the native C300 iso is 640.

I was wrong. "native" is 850.

0 dB is 640

 

[Robert Berger]

I understand the 320/800 ISO thing with these cameras (protecting highlight vs. noise in blacks). But how do other non-RAW-cameras manage this? Like the Canon HDSLR? When you change ISO to 100 on them, are the sensors overexposing, when using onboard histograms...like on the would on a Red?

I would suppose that that the issue would be exactly the same, except that Canon people "don't yet know of the problem"?

The manual of the 5D says, don't go brlow 200 ISO crushing the highlights.

Should I manage ISO in the same manner when using my Canon 5D, with ND's? Or should I not be afraid of going down to 50 ISO?

highlights.

Should I manage ISO in the same manner when using my Canon 5D, with ND's? Or should I not be afraid of going down to 50 ISO?[/QUOTE]


The manual of the 5D says, don't go brlow 200 ISO crushing the highlights.