Nikon 28-70mm f/2.8 AF-S
Sigma 28-70mm f2.8 EX D Aspherical - Lens – Kamerastore
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Sigma AF UC Zoom 28-70/2.8-4D - Tim Rogers Photo
Sigma 28-70mm f/2.8 EX DG Autofocus Lens for Nikon AF 549306 B&H
Sigma 28-70mm F2.8 DG DN Contemporary Review - Camera Jabber
The Sigma Zoom 28-70 mm f/ 2.8 Lens. Specs. MTF Charts. User Reviews.
Which Lens Is BEST for YOU? Sigma 28-70 f2.8 vs. Sigma 24-70 vs. Tamron 28-75. - YouTube
Field review: Sigma 28-70mm F2.8 DG DN: Digital Photography Review
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Sigma 28-70mm f/2.8 EX DG Lens Review
