Thanks i have 50mm for both nikon and canon and 80-200 f2.8 for nikon which is brilliant but i may upgrade to 70-200. I personally prefer Nikon however i did find that canon has bigger market for used bodies and lenses and it's relatively easy to find good priced used canon lenses as compared to nikon. I hardly buy new equipment, it's way over priced. I have some one selling to me d3s 65k auction for potentially £850 and i think d800 is more or less same price if not cheaper. Or i can grab a used 5d mk 3 between £1,000 and £1,200.