We're thrilled to welcome photographer and educator Katrin Eismann as our guest this week. Katrin has been at the forefront of digital photography from the beginning—literally shooting with earliest-production cameras that, in one case, was tethered to an external hard drive that weighed 12 pounds—which gives her an excellent perspective of where digital photography is today. "Photography is based on technology," she says. "The changes in technology influence the aesthetic and practice of photography."