Tom Lowe
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Stephen I was meaning to dig it up myself.
Can you bump it over there if you find it?
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I know my comments might not be the most germaine to the conversation at hand, but for me to be able to afford to own a camera that competes in this league is just nothing short of miraculous. I am sure Alexa is going to be a killer camera, with an appropriatly killer price tag.
Thanks Red.
If you're talking about a sensor - they have one fixed sensitivity, and it's down to how the pixels light gathering is designed and the filters that come before it in the optical chain.
Graeme
Film will hang on another few years (maybe longer) just like it did in still photography for one primary reason... The ability and the right to shoot film is what sets the top DP's and Directors apart. It is as much a status issue and a political issue (if not more) than it is a technological or quality issue.
The timeframe really isn't important... we all know its going to happen, its just a matter of time, and we are definitely at or near that cusp.
Film will likely always be around.. there really isn't a very good reason to shoot 16mm ( or even 8mm) anymore but people still do.. for aesthetic reasons.
Just like in the professional 35mm still world, (which I just read that 92% of published photographs are acquired digitally) some people still use film.. and likely will continue to do so as long as they keep making it.
If demosaic is done in camera for a 1080p output, it makes the quality of the in-camera demosaic and downsample vitally important.
With all due respect Graeme, this is without your having seen ALEXA, or having seen the sensor technology, capture methodology, raw data etc, in my view from this side a "guarantee" at this point is shaky at best. In due time on schedule as promised we will present ALEXA to the general public and we can then have a healthy and productive discussion about what we all see and can measure. Of course I believe we have the goods, but its really up to our customers and professional DP's to decide what we are offering, don't ya think?First - no such thing as a "real asa" for these cameras ... I can guarantee that the raw linear light sensor data is way too dark lit ISO800 to be of any use at all.
Graeme
Jim,
MAYBE IT MAKES MORE SENSE FOR ISO TO REFLECT THE EXPOSURE AT WHICH THE SENSOR CLIPS.
Imagine you have a sensor with 40 iso (clipping point), this doesnt tell you anything about you mid gray value wich is what we call "a visible image"...
Pat
With all due respect Graeme, this is without your having seen ALEXA, or having seen the sensor technology, capture methodology, raw data etc, in my view from this side a "guarantee" at this point is shaky at best. In due time on schedule as promised we will present ALEXA to the general public and we can then have a healthy and productive discussion about what we all see and can measure. Of course I believe we have the goods, but its really up to our customers and professional DP's to decide what we are offering, don't ya think?
That's my point. Right now 320 ISO doesn't tell us anything particularly useful about the mid gray value of the M-X sensor since the range of acceptable mid gray exposures is so large. When people hear 1600 ISO, they think "Holy crap. I'll have to ND everything", because they don't understand that the sensor's "clipping ISO" is 320.
Even film's "rating" is just a suggestion by Kodak or Fuji. After designing a stock, and testing it, they settle on a speed that produces the "best" image, in their opinion.
With all due respect Graeme, this is without your having seen ALEXA, or having seen the sensor technology, capture methodology, raw data etc, in my view from this side a "guarantee" at this point is shaky at best. In due time on schedule as promised we will present ALEXA to the general public and we can then have a healthy and productive discussion about what we all see and can measure. Of course I believe we have the goods, but its really up to our customers and professional DP's to decide what we are offering, don't ya think?
I get graeme's point as "Linear light" is always dark regardless of camera because of it's very nature. With the dual gain announced in Alexa, outputting an image that's not linear light is similar to taking a linear light image and transforming it into something else.