When legendary documentarian Errol Morris isn’t taking on grander topics of history (“Standard Operating Procedure”), true crime (“The Thin Blue Line”), and the cosmos (“A Brief History of Time”), he makes time for little slices of humanity, showcasing odd corners of life and art that identify character and passion in unexpected ways. “The B-Side: Elsa Dorfman’s Portrait Photography” isn’t the first film to tackle the detail of photography, but it offers focus on what’s become a lost art for a seasoned artist in Massachusetts, visiting the Elsa Dorfman archives to grasp her achievements with large-format photography using a Polaroid camera. Perhaps the subject isn’t for every taste, but Morris appears to understand inherent exclusivity, keeping “The B-Side” biographical but also visual, allowing time for the audience to grasp the specificity and serenity of Dorfman’s work.  Read the rest at Blu-ray.com