Canon’s latest salvos in the mega pixel wars are the 50 mega pixel Canon 5DS and the Canon 5DS R, bettering Nikon’s flagship D810 by more than 40 percent.
The Canon 5DS and 5DS R differ only in that the 5DS R differ only in that the 5DS R has the low pass filter “suppressed.”
The announcement of these new monsters brings up the question of “Who needs these beasts?” One clear answer is studio photogs and those shooting images meant for billboards. For the rest of us, it is a wait-and-see game.
If you are a travel and landscape photog, do you need 50+ mega pixels? That is up to you to decide. But, if you decide in the affirmative, you had better use Canon L glass and a tripod for every image, lest the abundance of mega pixels show how soft your images are. In addition, you should consider the tradeoff of poorer low-light performance with the new 5DS: the 5DS has a maximum non-expanded ISO of 6400, but the 5D Mark III goes up to ISO 12800. Again, your call.
For this travel, landscape and fine art photog, it will be wait and see; I am quote happy with my Canon 5D Mark III.