My collection of rust art continues to grow. I'm definitely more and more on the lookout for the possibilities presented by the oxidation process in terms of composition, color and intrigue. I'm excited to see what interesting and sometimes wild things result from the study of rust. The last series of rust abstracts I took were made with a 70-200 mm lens using an extension tube for focusing up close. With this series, I switched to a 100mm macro lens.