D600 RAW is not much better than A900

Started Sep 27, 2012 | Discussions thread
Allan Olesen Veteran Member • Posts: 3,391
Re: D600 RAW is not much better than A900

Michel J wrote:

In the other hand, do nocturnal animals, see random noise at night? I guess: no.

I know that the human brain does a lot of tricks to compensate for the flaws in our vision. I would assume the same happens for those nocturnal animals.

  • Backlit sensor to loose a minimum of photons;

Modern sensors lose less than half of the photons. So not much more to gain there.

  • innovative design of optics that would multiplying the ambient light optically (such as a converging system what can align multiple circles of images through a prism)

Sounds like a complicated way of achieving the same as you would achieve with a larger aperture.

  • no more infrared filter to capture more (surnumerary) photons;

  • an in-camera algorithm/processing that would restore infrared images, and interpret their colours to render them such as human eyes perceive it normally;

With the current technology, the camera can only know that those photons were infrared if it blocks them for some pixels and allows them for other pixels - just like the bayer filter we have today to make color photos. This blocking results in a loss of photons, so you may not gain a net benefit.

On the other hand, if someone invents a sensor which can count all photons and at the same time discern between their wavelengths without blocking some of them in a bayer filter, we would take a step forward in sensitivity. I don't even know if that is theoretically possible (there are some laws of physics which say that you cannot theoretically measure all properties for some systems precisely at the same time).

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