Test Conditions:-5D3 with EF35/2, K-5 with DA21/3.2; Shoot at f/8 at nearly the same time (just note the positions of the moving objects like the clouds); ISO 100; Evaluative metering for both and exposure results are really close; Auto white balance; Colour profiles: 5D3: Standard 2, 0, 0, 0, K-5: Natural +1, 0, 0, +1, +1(FS) - both are my own preferred defaults chosen for the most accurate