Abel Cine Measures Sensitivity & DR

At least two stops less dynamic range that the standard F3, what is the reason to balk about that they have the same sensor when the difference in performance is so huge. Perhaps I miss the point of this camera, it was meant for people shooting only at night.
 
At least two stops less dynamic range that the standard F3, what is the reason to balk about that they have the same sensor when the difference in performance is so huge. Perhaps I miss the point of this camera, it was meant for people shooting only at night.
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I don't know what they were trying to do.....but that low light mojo is LITERALLY off the charts. Amazing stuff! Perhaps you are right....F3 + FS100 = SLOG + low light king? We'll see what it's legacy becomes....
 
Example....btw....this was shot with a lens that isn't noted for low-light ability (to put it lightly)

 
To put the +30db / 16,000 ISO concept into perspective, it means that using a T1.3 lens key light exposure is 1/10th of a footcandle.

That's insane.

Even at a T2.8, the key is still about half a footcandle. And there's still almost ten stops of Dynamic Range. Sure +30db has noise, but it is way lower than one would ever expect at such ridiculous gain. It is an incredibly quiet sensor.
 
Nice chart Mitch, srry for dumb question but is this cam do +1db gain increments or only +3db gain increments?
Also this is off topic but is there back focus adjustment on the FS100?
 
Hey, wait a minute.

The scope shot only seems to show 10 stops of DR. Yet the chart has 11 stops of value clearly visible, without getting into whites. The dome on the light meter is another value whiter that's clearly visible. I don't think this is a valid test of DR range.

Also, the F3 is ISO 500 at -3db. The FS100 is ISO 500 at 0db gain. Is there no -3db on the FS100? (Which would make the ND filter situation less dire if -3db is ISO 200 or 300. I heard there wasn't on the preproduction model, what about the production models? Anyone have one?)
 
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Only 10 stops? This must be wrong!
What I don´t like so much is the missing cinetone 3 and 4 gammas. Cinetone 1 is a lot darker in the midtones.

@Mitch Gross: How do you know DR @30 DB is still 10 stops?
 
I see only ten stops on that display and when you look at the F3 scope, it shows at least two stops greater.

That's good for a videocamera. It only pales in comparison to the F3. Stuff I've seen from preproduction models also suggests the F3 has significantly greater DR.

I'll do my own tests when I get mine, thought I don't expect 11/12 stops from it.
 
I see 10 stops too, but the 5D Mark II has also been measured with 10 stops in video mode in some tests, so clearly these tests aren't strictly controlled. I'd say it has similar DR to the 5D Mark II, which is not bad at all. Especially considering it's additional low light performance over the 5D.
 
Duke M. said:
Maybe I don't understand, but here's what I see.

View attachment 34539
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I see that too but I'm talking about the scope. From the output it clearly looks like 11 stops doesn't it? I'm no expert in charts though. Something's amiss here, either in the test or our understanding of it.

I think a greyscale chart with 18 steps is what you really need to measure against and they likely did. Something like this: http://www.dsclabs.com/images/New Images/GreyScales/DX1-72dB.jpg

One would expect about 10-11 stops from the FS100 though, leaning towards the 10 range.

Here's what the 5D2 has... looks like just over 10 to me: http://provideocoalition.com/index....d_how_much_dynamic_range_does_it_have_really/

One more thing. We don't know how Zacuto is doing their tests, but they show 11.2 stops of DR with the 5D2:

http://provideocoalition.com/images/uploads/NAB11AWP1000307.jpg

They also show the same DR rating for the F3. So who knows who is exactly right? Go in expecting the DR of a 5D2 approximately and you'll be happy.
 
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wait until you can test it yourself, what is an acceptable range of DR on a chart can very from person to person. With all of these tests we need to consider where it is comming from and how it was done, and then take it with a grain of salt and use it is a jumping off point for a measure of the camera's true capabilities.

Thanks for this it's very informative, especially the low light tests.

Have a good one!
 
No front lit printed greyscale chart can show more than about 6-1/2 stops DR between black and white due to the difference between maximum reflectivity of matte white media and the maximum density of black inks. The standard 11 step chip chart is calibrated in 1/2 stops for a 5-1/2 stop range. It is intended to measure the critical mid tone scale range. It takes three separate exposures bracketing 3 stops over and 3 stops under nominal exposure to get an approximate DR measurement of 11-1/2 stops. A back lit transparency chart is the most consistent way to measure the full DR of modern cameras.
 
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