ChrisKten
It's true, I quite like Pigeons
Well I am giving up. Unless someone has a suggestion to get the Nikon performing significantly better, I'll be sending it back.
I've posted so many comparisons. Nothing is changing.
The first two are the Nikon and the second two are the Canon.
These are from probably 30 feet abouts.
Nikon is 2000mm
Canon is 2439mm using the 2x digital teleconverter.
And the Canon is not on fine mode or whatever Canon calls it. It's only on normal JPG and so the Canon photos could be even better than the Nikons.
The Nikon is saving on Fine mode.
And it kills me that on average the original Nikon files are about 6mb and the Canon's are 3mb.
I'm surprised that nobody has explained the file size difference:
The Nikon P900 has a 16.0mp sensor and images are 4608 x 3456
The Canon SX50 only has a 12.1mp sensor and images are 4000 x 3000
So (all else being equal) more info is recorded and saved by the Nikon. None of this really matters at web size images, as you'll have reduced the resolution for upload anyway. And unless you're going to print large posters, 4mp extra detail won't matter much to you.
So higher resolution image = more data = larger file size