I am considering investing in a second system. Specifically Nikon D610. However, I have never shot full frame before. I primary shoot travel/hiking (recently been to japan, patagonia, hiking peru etc), landscape/cityscape and long exposure milky way. My main reason is for low light, milky way shots, larger prints, higher dynamic range for landscapes. reduce primes and shoot zooms. I would sell off one omd body and most lenses only keeping the 12-40mm and 40-150mm as I will not be investing in a telephoto of that length in full frame for awhile. Currently I own: 2 x OMD EM5 Olympus 12-40mm Pro Olympus 40-150 Olympus 9-18mm Olympus 12mm f2.0 Olympus 45mm f1.8 Panasonic 20mm I am looking at: D600 14-24mm Nikkor 50mm 1.8 Nikkor 20-70mm Nikkor My questions are: 1. How will I fare without an EVF for exposure purposes? 2. How do the nikkor lenses shape up against the sharpness of the omd primes eg the 45mm 3. How do the nikkor lenses shape up againt the omd zooms in terms of sharpness etc. 4. How much will I miss IBIS when shooting hand held compare to the nikon lens stabilization. Edit: D610 not D600, also not really considering the D800 due to the file sizes.