Trees, because of branching breadth and trunk height, can be challenging subjects to photograph. In this Arnold Arboretum class, which will take place Sunday, October 28, from 9 – 1 beginning in the Hunnewell Building at the Arboretum, Erik Gehring will provide tips, tricks, and photographic theory in order to create unique and dramatic images of trees. Time will be split between the classroom where you’ll discuss theory and preparation, and the landscape, where you’ll examine the Arboretum’s specimens, think about composition and framing and imagine what conditions will best complement the subject. Fee $40 Arboretum member, $55 nonmember. Register on line at www.my.arboretum.harvard.edu.