New Sigma 500mm f/5.6 size comparisons by Alex Phan

Preorders: 500mm f/5.6 at BHphoto, Amazon, Adorama, FotoErhardt, Calumet, WexUK. 15mm f/1.4 fisheye at BHphoto, Amazon, Adorama, FotoErhardt, Calumet, WexUK. 300GM + 2x TC vs Sigma 500mm f/5.6 Size compare between the new SIGMA 500mm F5.6 DG DN OS | Sports with Sony 70-200GM ii and 100-400GM...