They've telegraphed the big MP FF (to keep people from jumping to Nikon I suppose) ...
Canon hasn't telegraphed anything.
The 46mp figure is derived by scaling the resolution of the 7D/60D sensor to FF:
- 18mp * 1.6 * 1.6 = 46.08mp
Not sure who thought that this was a good idea but it looks like wishful thinking to me.
40mp would be much more palatable, for example.
A 40mp sensor will be able to achieve UHD video resolution
(3840 × 2160) with 2x2 pixel binning.
Canon is already doing 2x2 pixel binning on the 5DIII for HD video (hence the magic number 22mp).
And it would only make sense if they do the exact same thing on a high-MP camera.
This would require a 40mp sensor, though, not a 46mp sensor.
So, 40mp is actually more likely than 46mp for the high-MP camera.
The 46mp figure is not only not
telegraphed by Canon but it's also a very weak [CR0] rumor.