[Brightcolours]

I have been absent from the forum for a long time. during that time I sold all my Nikon gear, bought into Olympus EM1 with their best glass, including the 40-150 f2.8 + conv 1.4.  My photography includes wildlife, flying birds, nature and landscapes, travel, portraits and events and I print to A3+ at least. Unfortunately, the MFT sensor and the AF systems of the Olympus do not permit me to get the quality required for printing. I probably should have known, but I'm back to having to start all over. My thoughts are the Nikon D810 or D750 or D500 with the standard primes, 20, 35, 50, 85, 135 and the 200-500 f5.6 and/or the 300 f4VR with the converter. I could also go Canon. If I go Nikon, my main choice is between the D500 or one of the two full frames. 

I'd love to get the Pentaw K1, but the AF is not up to par for moving subjects so I forget that, but I really like the specs of that housing.

So Klaus, Brightcolours, all of you, give me your best input, because this is my last kit change and it needs to be the right one.

I imagine that wildlife and BIF is best done with a DSLR, and APS-C gives you more tele reach. You are used to Nikon, and the D500's AF system seems to be a step above that of the Canon 7D mk II. And Canon does not offer such an affordable 500mm option.

 

For the rest (Nature/landscapes/portraits) it depends on your lens choice (which depends on your personal preference and style) which camera suits you best.

 

In my opinion, FF's main advantage is possible less DOF. So, if very shallow DOF is not your objective, I think a D500 may be a good choice indeed.