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    #11
    Red Leader Jannard's Avatar
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    David Stump determined that the Mysterium sensor is ISO 200, but he and many other experts will likely recommend shooting at ISO 320-400. That gives a ton of room for the highlights to survive and plenty of elbow room for a beautiful clean image.

    Jim


     

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    #12
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    so.. it won't be a elbow pain.. eheh..

    portuguese meaning:
    http://www.google.pt/search?hs=adw&h...esquisar&meta=


     

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    #13
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    Jim, do you think we can make it to 11+ f-stops of latitude DR when the camera is done next year?


     

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    #14
    Red Leader Jannard's Avatar
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    There is a big difference between dynamic range (11+ stops) and exposure latitude. Somebody else step in and explain it. I'm tired.

    Jim


     

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    #15
    Cross-Examiner Emanuel's Avatar
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    So, take a break, you deserve it more than someone else. For today, the good news are enough!
    RED ONE @home
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    Who am I?

    * LINK *
    ** IMDb **


     

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    #16
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    http://en.wikipedia.org/wiki/Stops_%28Dynamic_Range%29 and http://en.wikipedia.org/wiki/Exposure_latitude, there are other literature too. Am I missing certain concepts here?


     

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    #17
    Senior Member Darkline's Avatar
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    Please do.

    I am a little confused. If exposure lattitude and Dynamic Range are different terms, but we still speak of them in 'stops' lets talk about other cameras in terms of exposure lattitude for comparisons.

    So far I've only heard about other cameras and film lattitude being described in terms of DR. For example, the HVX i think has 7 stops from what I've read, film 11 stops or more, I heard someone say they pushed a varicam to 10-11 but I find it hard to believe it's anywhere close to film's lattitude.

    I dont mind which term is used, but it would be nice to have a reference for comparison. If Red has 8 1/2 stops of Exposure lattitude, what does a HVX have, film, and the current crop of high end HD cams?


     

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    #18
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    Darkline, I agree. I could be wrong here, but isn't DR is Signal to Noise Ratio, it means how much you can keep exposing light from noise floor 'till you get saturated/maximum signal. Exposure Latitude is how many stops of exposure from dark 'till you get highlight blows out. So what is the difference? Is that DR by its definition?


     

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    #19
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    Quote Originally Posted by Jannard
    There is a big difference between dynamic range (11+ stops) and exposure latitude. Somebody else step in and explain it. I'm tired.

    Jim
    Hi Jim,

    I will try!

    Latitude is the amount you can over or underexpose and still get a good result.

    A scene with a 7 stops of dynamic range, could in theory be over or underexposed by 2 stops and stay within the range of a sensor that had 11+ stops of dynamic range.

    On a bright sunny day there may be in excess of 11 stops of dynamic range, so exposure accuracy can be very important.

    Stephen


     

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    #20
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    Boothba,
    Your gradings of the original test chart frames were interesting and provided
    an initial insight into the current pictures out of the Mysterium.
    Id really like to see the same tests done with ramps as I find Grey
    steps and Color blocks very hard to find things like Color Banding. Its
    also a great way to see what happens to the values just beneath those clip points.

    It would be great to see some:
    Grey scale 0-100 ramps
    FINITE white steps from (in 8 bit termilogy) from 220 - 255
    Finite Black Steps from 0 - 25
    Full 75%RED-75%GREEN Ramps
    FULL 75%BLUE -75%YELLOW Ramps.

    grAdo
    Last edited by grAde; 11-17-2006 at 02:56 AM. Reason: subscribe to thread


     

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