Brad Hill has posted a detailed comparison review between the Sigma 500mm f/4 DG OS HSM Sports lens ($5,999) and the Nikon AF-S NIKKOR 500mm f/4E FL ED VR lens ($10,296.95) on his blog. Here is a summary: The differences in AF performance of the Sigma Sport 500mm f4 and the Nikkor 500mm f4E VR … Continue reading Sigma 500mm f/4 DG OS HSM Sports lens vs. Nikon 500mm f/4E FL ED VR lens comparison review