What is the best lens for wildlife photography? The Nikon 500mm f/4 is a huge contender. It's also amazing for sport, just ask any pro sport shooter. For news, like my flooding rescue pic in Wales, it's invaluable to get closer to the action or photograph incidents from behind a cordon. The 500mm is pin sharp and the VR is super stable at slower shutter speeds, even when hand-holding at 1/80th sec!
Is the Nikon 400mm f/2.8 still worth buying? Well, it's built like a tank, weighing almost a whopping 5kg, but with superb optics, that never seem to degrade. My lens has been out in all weathers and as you can see from the stormy pic I captured with it in Porthcawl, Wales, it has been pummelled with salt spray many times. It's great for low light at f/2.8 and is still really sharp across the frame.
Was the Nikon 300mm f/2.8 AF-S II any good? It really was a workhorse for years, (it still is for many professionals) and I've taken some really great images with it. However, it's cumbersome and weighs just over 3kg so doesn't come out to play that often. Wide open at f/2.8 it helps to pick off subjects and isolate them, like my pic of a young chap saluting through the rear of a passing hearse at Royal Wootton Bassett.
What is the best telephoto lens? Well, my money is on this tiny beast! For a lens as small as a Nikon 24-70mm, weighing a mere 755 grams, it's unobtrusive and optically tack sharp. Working at a fixed distance from a subject, like covering this Taylor Swift gig from the photographers pit, I was able to shoot for ages without tiring. It's an excellent candid street-photography lens too!