Phil Rhodes explains why luminance is so important within photography
Another chance to read this fantstic pair of articles: If you use a professional digital camera, you can't go far without understanding the relationship between sensors, lenses and depth of field. It's slightly more complicated than you might have thought!. Phil Rhodes makes it understandable
As we saw in my previous article on sensor technology, we can now build sensors with enormous numbers attached to them - if not trivially, at least reliably. Given that current 4K sensors are more than adequate to replace 35mm film in terms of sheer resolution, we need to be careful about turning this into a numbers game.
Recently I've been expressing the view that all cameras are pretty much the same, because they all use the similar technology (give or take) for their sensors. I don't mean to be unnecessarily cruel about the work of camera manufacturers – taking an electronic component such as an imaging sensor and making it into a usable tool is far from trivial. Still, the absolute performance of cameras is determined by what you can get off the lump of silicon behind the lens