Auf dem Papier hat der Fairchild Sensor sogar mehr:
Mathematically, though, there is only one way to measure DR from a sensor.
Both the Fairchild sensor in the original Pocket (CIS1910F) and the 4.6K Fairchild sensor (LTN4625A) are listed on their specs pages as having greater than 88dB. 88dB is over 14.5 stops of dynamic range (88 / 6.02 = 14.62).
Blackmagic list the original Pocket (and the Micro) at 13 stops, but list the 4.6K sensor at 15 stops.
Now, you could say that the 4.6K sensor has more DR in general, as it does push the noise into smaller pixels, given the same viewing area. However, if you were to take an HD crop of the 4.6K sensor and compare it to the Pocket, the DR may be the same. (I haven't tested or seen a comparison myself, though).
Mathematically, the sensor in it can do 14.6 stops.
The math is taking the 20log(10) of the Full Well Capacity (30,000 electrons) divided by the Read Noise (1.2 electrons).
So, for the sensor in the OG Pocket, it would be 20log(10)(30,000/1.2) which does work out to be about 88dB or 14.6 stops.
The Sony IMX294 sensor in that 2nd link I posted is listed as having a full well capacity at 400ISO of 63700e with about 7.41e read noise. At 2400ISO the read noise drops to 1.75e and then the full well also drops to about 14800. Looking at the math:
@400ISO=> 20log(10)(63700/7.41) = 78.7 dB or about 13.1 stops.
@2400ISO=> 20log(10)(14800/1.75) = 78.5 dB or about 13.0 stops.
So, I do think that there is going to be less dynamic range. That being said, the increase in resolution may make it so that the apparent dynamic range is greater.
https://forum.blackmagicdesign.com/view ... 00#p403935