Thom finally resurfaces, with comments sure to be controversial, at least here ...

Started Apr 17, 2014 | Discussions thread
John Carson Veteran Member • Posts: 4,238
Re: Thom finally resurfaces, with comments sure to be controversial, at least here ...

photoreddi wrote:

John Carson wrote:


I mean, why stop there? Wouldn't you then want a camera that could shoot photos with vivid, saturated colors at fast shutter speeds just by the light of a waning crescent moon?

Ideally, yes.

I'd want that too, but today's best sensors haven't got too much room left to go for any improvement, so waiting for this to happen is a pipe dream that can't be counted upon to be realized.

Modern digital cameras contain electronic sensors that have predictable properties. Foremost among those properties is their relatively high Quantum Efficiency, or ability to absorb photons and generate electrons. Second is that the electronics are so good in most cameras, that noise is under 2 electrons and rarely worse than about 15 electrons from the sensor read amplifier. With the low noise and high Quantum Efficiency, along with the general properties of how the sensors collect the electrons generated from photons, it is possible to make general predictions about camera performance. An important concept emerges from these predictions that we are reaching fundamental physical limits concerning dynamic range and noise performance of sensors.


Which is why the tremendous improvement of the D3 and D700 sensor which was followed by a healthy but smaller improvement by D3s's sensor was followed by only a very small improvement by the D4's sensor. Fuji's sensors similarly have little room left for improvement. Canon's another story.

The human eyed doesn't violate the laws of physics. That being the case, whenever sensor performance is inferior to that of the human eye, the problem is one of technology, not physics.

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john carson

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