Focus ring Sigma 18-250 mm F3.5-6.3 DC Macro OS HSM. Lens Focus Rubber Ring Sigma 10-20 mm F3.5 EX DC HSM Lens AG1222. Lens Zoom Rubber Ring Sigma 10-20 mm F3.5 EX DC HSM Lens AG1221. Lens Focus Rubber Ring Sigma 17-70mm F2.8-4.0 DC Macro HSM AG1212.
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