I have used Olympus gear almost exclusively since Jan. 2016. But I did not get rid of the Nikon camera and lens I used most frequently before I purchased the Olympus equipment. Last month I saw the 500mm f/4 G lens in the closet and wondered if, after 3+ years of using lighter gear, I could still handhold that 8.6 lb monster and get reasonably sharp images. So, I grabbed the D500, a couple of teleconverters, and the 500mm lens and headed to a local park - without a tripod. I was reasonably optimistic. I was still doing 100 curls with 12 lb weights and holding one weight in shooting position periodically most mornings. I think that helps even with the lighter Olympus gear. I acquired images that were not bad (in my opinion). But I’m not sure how I would do handholding the lens over a longer time period and I know my aged knees complain when I carry it over long distances.