Could someone measure dynamic range in cinegama modes. at DVinfo.net

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Sony XDCAM EX Pro Handhelds
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Old December 1st, 2007, 04:40 PM   #1
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Could someone measure dynamic range in cinegama modes.

how many stops of dynamic range does it have. I know the gamma curves can help to increase it. Is it better than the hvx200

Thanks
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Old December 2nd, 2007, 03:45 PM   #2
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Quote:
Originally Posted by Mark Edwards View Post
how many stops of dynamic range does it have. I know the gamma curves can help to increase it. Is it better than the hvx200

Thanks
Give us your specific method of measuring dynamic rate, Mark, and I'll try it.

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Old December 2nd, 2007, 11:01 PM   #3
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if you have one, you could use a step wedge. I am not sure of how many ways it is possible to measure dynamic range, but if you have your own way I'm not stopping you.

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Old December 2nd, 2007, 11:29 PM   #4
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Anyone who can give us an idea on this?

Im dying to know how it compares to a HVX or even something cheaper like say a canon XH A1.
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Old December 3rd, 2007, 01:33 AM   #5
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As a start, you could see how many f/stops stops it takes to get a grey card to expose from 0 to 110 IRE. You can use the built in ND filters if because there isn't enough range on the lens.

The 1/8 filter subtracts three stops of light and the 1/64 another three stops, totalling six stops.

You can use FCP at your waveform monitor, going in by firewire, but preferably by SDI. Even better, use a "real" waveform monitor connected to the SDI output.

I haven't had time yet to do anything precise like this, but I used the EX1's built in histogram, which is a crude tool to say the least, and got about seven stops.

Of course this relies on the lens and ND filters being well calibrated. Changing the light on your grey card with an accurate exposure meter and not changing camera settings might be more reliable.
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