How Important Is Dynamic Range, Really?

T

thisiswells

Retired
Sometimes I wonder if unlimited highlight detail would be good for me. I mean, what would I do with it? Would it make me lazy? Would I be less concerned about my contrast? Would I become too relaxed about my exposures? It wouldn't really matter if I was three stops over or two stops under, because I could fix it in post, right?

The future of RAW recording and increased dynamic range means there is a lot of room for fixing mistakes. But, is that really a good thing? I don't know...
 
i cant wait for a real HDRI video camera. To make an HDRI you have to take the image at different exposures and put them together giving you an image with with 100+ times the information to work with. You are not limited to the 256 brightness values. I dont see why they cant make a camera that can take 2 f-stop settings and record them over each other. The bandwidth shouldnt be a problem. The way I see it that you would have 6ccds and 3 of them record the lower Fstop and the other 3 record a higher Fstop. Both f stops should be able to be controlled also. This way you can expose for the darks and hilights.
Yeah It maybe expensive but i bet its doable.
It should make compositing 3D elements into live action plates easier since you could use the video as a radience map and get the true lighting of the scene.

This guy is the master of HDRI
http://www.debevec.org/
 
Aram Bauman said:
I dont see why they cant make a camera that can take 2 f-stop settings and record them over each other.
Click to expand...
I can think of a number of reasons why that wouldn't work... First the f/stop is a mechanical setting on the lens. I'm not sure if moving it 48 times a second in sync with a shutter is even possible.
 
What if one set of CCDs were one-stop less sensitive? I dunno... I'm just asking... I don't know anything about HDRI. :huh:
 
Aram Bauman said:
i cant wait for a real HDRI video camera. To make an HDRI you have to take the image at different exposures and put them together giving you an image with with 100+ times the information to work with. You are not limited to the 256 brightness values. I dont see why they cant make a camera that can take 2 f-stop settings and record them over each other. The bandwidth shouldnt be a problem. The way I see it that you would have 6ccds and 3 of them record the lower Fstop and the other 3 record a higher Fstop. Both f stops should be able to be controlled also. This way you can expose for the darks and hilights.
Yeah It maybe expensive but i bet its doable.
It should make compositing 3D elements into live action plates easier since you could use the video as a radience map and get the true lighting of the scene.

This guy is the master of HDRI
http://www.debevec.org/
Click to expand...

Fuji is already doing that with their digital cameras, but to a lesser extent. they use CCD's with different sizes and sensitivity to catpure a greater dynamic range. So something like this is possible, although Fuji cameras really don't show that much greater dynamic range as of the current date, but we'll see what the future holds.
 
What if the lens iris was open all the way and split the image through a fiber optic thingy that reprojects it into the actual image sensors. The controlled iris' can be at the end of each fiber optic.
 
I'd say that in most cases its unnecessary. We've had the capability for it for years
in film post and havent always used it. Video has always been worst case, but if
we can get seven stops of sensitivity, with one camera, on either end of the scale,
we'll be in a great place.

We're getting close, but the average display medium and its calibration is still the
wild card.
 
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