Sigma 24-70mm F2.8 DG OS HSM A for Canon review: Third-party option - DXOMARK
DXOMARK - AF-S Nikkor 24-70mm f/2.8E ED VR Review. Disappointing DxOMark scores for the updated Nikon standard zoom for press, weddings, portraits, and events: http://dxo.io/1Q58FNA | Facebook
AF-S Nikkor 24-70mm f/2.8E ED VR Reviews: Updated Nikon standard zoom for press, weddings, portraits, and events - DXOMARK
The new Nikon AF-S Nikkor 24-70mm f/2.8E ED VR lens tested at DxOMark: "disappointing scores" - Nikon Rumors
Tokina AT-X 24-70mm f/2.8 PRO FX Nikon lens review: Top performer - DXOMARK
DXO Comparison Rates Tokina 24-70mm f2.8 Highly VS Canon, Nikon
Nikon Nikkor Z lens roundup - DXOMARK
Nikon Nikkor Z 24-70mm f/2.8 S review - DXOMARK
Nikon Nikkor Z 24-70mm f/2.8 S review - DXOMARK
AF-S Nikkor 24-70mm f/2.8E ED VR Reviews: Updated Nikon standard zoom for press, weddings, portraits, and events - DXOMARK
Pixel-Peeping Reviews of Nikon's 24-70mm f/2.8E ED VR Leave Room for Sigma to Kill | Fstoppers
AF-S Nikkor 24-70mm f/2.8E ED VR Reviews: Updated Nikon standard zoom for press, weddings, portraits, and events - DXOMARK