New Question from a new Forum Member, which has probably been asked a million times before, however I would appreciate your advice.
I am going to visit Namibia this August, I own a Sigma 150-500mm and have used this lens on my D300 and D800 on my last two trips to Zambia. I was not thrilled with the image quality of the lens. I do own a Nikon 70-200mm f/2.8 VRII, plus TC-1.7eII and TC-2.0eIII. I think I'm getting better images with the Nikkor and the TC's but I miss out on the reach. Given a limited budget should I a) Take the Sigma and try to improve my technique with the lens, b) Take the 70-200mm and crop or c) buy a longer lens and if so which one gives me the best value for money, maybe the new 300 F4?