I am lil confused over deciding on two lenses Sigma 150-600mm Sports and Nikon 200-500 mm
I am getting the following offer
1)Nikon 200-500 $1179.28 (US Dollar)
2) Sigma 150-600mm sports version with USB Dock $1940.59 (US Dollar)
3)Sigma 150-600mm sports version with Sigma TC1401 (1.4x...