simple lens cleaning procedure performed on minolta's 50/1.7, 17-35/2.8-4 and sigma 105/2.8 macro. if you shoot concerts, lenses become dirty almost every show. here's how i deal with that. 105mm is the most difficult because of the front element being located deep in the barrel



http://www.youtube.com/watch?v=m3QpN8O9jkw&hl=en

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