Re: Official: Fujifilm GFX 50S Medium Format Announced!
Schlotkins wrote:
On the Nilkon, you\'d probably end up with even more DR given whatever secret sauce Nikon came up with at ISO64.
ISO 64 with an accompanied increase in dynamic range can mean only one thing: increased well depth (number of photons a pixel can receive before becoming saturated). The well depth is an intrinsic property of the sensor, it\'s not like Nikon found some clever way to tweak it for extra performance, so the credit belongs to Sony.
It sounds like the d810 sensor is a generation 4 Exmor:
\"With the first [three] generations of Exmor technology addressing the pixel/sensor noise issue, it only seemed natural that the fourth generation Exmor technology addresses the NIR sensitivity by introducing deeper pixel wells to help capture these longer wavelengths. Not only do deeper pixel wells provide a higher dynamic range of pixel values that can be achieved, i.e. could capture and hold more electron data before saturating, it also increased the chances of detecting longer wavelength photons in the deep red to NIR range\"
Whereas the A7RII sensor is a generation 5 Exmor RS, which was based on generation 3:
\"When Sony created their first sensors with the Exmor R technology, they based it on the third generation’s pixel well depth. Though these sensors showed a dramatic improvement in sensitivity and responsiveness in the visible spectrum, they did not have the same performance in the NIR spectrum as was previously seen with other Exmor fourth generation based sensors.\"
Sep 28, 2016 at 06:06 AM
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