Sigma 18-250mm F3.5-6.3 DC Macro OS HSM: First Impressions with Walter Arnold

Pro Photographer Walter Arnold has been shooting new ad campaign shots with the new Sigma 18-250mm F3.5-6.3 DC MACRO OS HSM on the sly for the past few weeks. We spent a few minutes talking with him about his experiences with this amazing new superzoom. For full press release and technical specifications click here.