Can Sony's $2,698 400mm Prime Keep Up With the 600mm?

Sony now has four lenses that can get you to 600mm or beyond for birds, and two of them weigh around 1 kg while costing less than many full frame bodies. Once teleconverters come into play, those lenses overlap in focal length, so the choice comes down to how much weight, money, and light each route to the same reach will cost you. [Read More]