« on: November 07, 2013, 07:29:39 AM »
2. Lacking of 4 megapixels, is it the big gap between 1DX and 5D3 on landscape shooting?
There is more than one account on more than one forum that mentions that it isn't just the number of MP.
Above a certain ISO threshold, the noise effectively reduces your MP count for you. How that camera resolves/processes the noise begins to matter more than MP counts.
I don't recall the numbers exactly, so I will not quote them. Feel free to do your own digging. I recall reading, essentially, that if you take pictures at a relatively low ISO all the time, say ~400, there is no readily apparent difference between the 5DIII and 1DX and the 5DIII has a slight advantage if you pixel peep. That changes quickly as the ISO goes up.
There is also very little difference in image size when printed at 300 dpi. Others smarter than I have done the math.
While 4mp sounds like a lot, if you do enough digging, the conclusions will be readily apparent.