Image quality with the Canon 5Dmark 2 vs.. The 5Dmark3?

[ryee3]

I use Leica lenses on a canon body with an adapter.  Is the image quality with the Canon 5Dmark 2 vs.the 5Dmark3 similar?  Any reason to get one vs. the other?  I like the idea, that I can change the viewfinder screens on the Mk 2. Any overwhelming improvement of the  5Dmark 3 that would warrant consideration?  Thanks to those who have used both camera bodies.

[diverhank · Accepted solution]

The primary advantage of a Mk3 over the Mk2 is the AF.  More points and it can focus with f/8.   If your Leica lens is manual focus then you wouldn't care about it.  The 5D3 has a little of an advantage in the ISO but not a huge factor.  Other than that I'd say IQ is the same.