Sigma 28-105 2.8-4.0 Aspherical
by darerecich
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Sigma 50/2.8 Macro
by lwestfall
| 
Witte Kwikstaart - White Wagtail
by Richard Diepstraten
| 
Tour de France - Paris, May 2002
by mic_hong
| 
The Frank Thompson Collection
by Mike Stobbs
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Sigma 18-200 f/3.5-6.3 Super-Zoom Lens
by Harry Lavo
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Sigma 105 mm
by Pam Haley - FrogHouse Photo
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Sigma 12-24mm lens
by Erik Magnuson
| 
One Month Prime Challenge with Sigma 30 f1.4
by Michael Schuster
| 
The Sigma Files
by Knobby
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