I am finding it difficult to decide between the Nikon 200-500mm and the Sigma 150-600mm lenses for wildlife photography (especially birds). I have read lots of review for both the lenses, but I still have not reached a conclusion. Points to consider:
- I need fast and excellent auto focus.
- Great image stabilization. I have noticed with Sigma, corners are very sharp in some some images, whereas with Nikon corners are quite bitter. (I also understand image stabilization depends upon subject and my hand.)
- Last but not least, price.