I am confused with the science of electronics, regarding cameras and sensors. I have read the posts and answers here and elsewhere. All I walk away with is the electronic specs of cameras and sensors.
I can relate to signal to noise ratio being relative to detail in a sensor. That can be affected by heat, design and age. But the ground level facts are that our cameras capture detail and tonal values. Any other features are just shiny distractions from the basic function.
I accept the fact that my Canon 5D Mk2 has less detail than the 5D Mk3. I accept that my camera has more noise than the 5D Mk3. But both cameras are within a half stop on tonal range. DxO labels my camera as having a 9-stop tonal range. My field tests agree with that finding. Yet it is repeated way too often that digital cameras have more DR than we need for a high dynamic range scene.
What dynamic range is being referenced here? Total? Tonal DR? Total tonal shift DR? Total detail DR? Total signal to noise DR? or what?
Am I wrong that we humans can see a dynamic tonal range of 25 stops? As well, depending on the author of article, book or video, we have roughly a potential of a 25-27 stops of tonal range in landscape scenes. Can someone boil this down to real world reality?
I practice a modified version of the digital zone system and my real world results seem to be very different than most specs hype. My field test of my Canon 5D Mk2 returned the following values: 9 stops of total tonal range, 7 stops of total tonal shift range, and 5 stops of total detail range. Respectfully curious!