I did the 1DX, 1D4, and 5D3 shots of a church this evening. I did nothing to the photos except crop to the church, as I was using a tripod. I shot at f/8, 24mm, and used Center Weighted Average on the highlight on the face of the church. The 1D4 I ran out of room, sorry. I took two shots, one at ISO 100, and another as high of an ISO I could go. Note the metering is different, as at ISO 2000, f/8, the 1DX and 5D3 give different shutter speeds to achieve the same exposure.