For many years I used all Nikon gear as I am a very keen enthusiast Photographer, I have over the years sold a few pictures but I am by no means a professional. I started to find it difficult lugging all my Nikon gear ( DSLR + 3 lenses ) around particularly uphill. I went to the doctor and found that I was suffering from COPD. Just after this, I sold all my Nikon gear and bought my first mirrorless camera and two lenses for it weighs about one-third of my Nikon gear and the picture quality amazed me. I am now using a Panasonic top of the range G9 and when I show images at photo clubs no one can tell that the images were shot on a mirrorless camera, I can compete with anyone with any camera. I rest my case.