Sigma Lens Hood for 17-70mm f/2.8-4.5 Digital Macro Lens
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Sigma 17-70 mm f/2.8-4.5 DC Macro - LensTip.com
Amazon.com : Tronixpro 72mm Pro Series Hard Tulip Lens Hood for Sigma 18-35mm f/1.8 DC HSM Lens, Sigma 18-35mm f/1.8 DC HSM Lens, Sigma 17-70mm f/ 2.8-4 DC Macro OS HSM Lens :
Sigma 17-70/2.8-4 DC MC OS HSM C EOS Lens Silver | Techinn
SIGMA | Lens Hood LH680-01 - Sigma
Sigma Lens Hood f/18-50mm f2.8- EX DG, 28-70mm f2.8 EX DG | Lens Hoods and Shades | Sigma at Unique Photo