Ok, I'm headed to Alaska in about 3 weeks and need a telephoto. And I need help:redface:. All opinions welcome. I have it narrowed down to these: 70-300 AF-S VR 50-500 Sigma 80-400 Nikon 80-400 Sigma 200-500 Tamron Issues 70-300: I can afford it, but many say it is soft above 220-240 and I think it might be a little short so I will probably at or above the 220-240 most of the time. Issues 50-500 Sigma: Probably bigger than I want but 500mm would be real nice. But unlike the the VR/OS lenses it would require at least my monopod. Issues 200-500 Tamron: Don't know much about it, it's gotten ok reviews but most qualify its performance with price for the range. would also need the monopod. Issues 80-400 Sigma: Bigger and heavier than the Nikon and hard to find. But better priced if I can find one. Issues 80-400 Nikon: If I had the money it would be my first choice (wish I had not sold the one I had). I thought about a 300 f4 AF-S but I have a problem with long primes. I see mainly with one eye so tracking with the eye not looking through the lens is not really possible. I find it much easier to zoom.