In Focus is a thorough investigation of UFO sightings. It presents a series of case studies spanning from the 1940s through the early twenty-first century, viewed through the lens of forensic science. The author is the staff photographer for the Mutual UFO Network (MUFON). He analyzes cases that have been thoroughly documented over the past nearly 70 years and vetted by the scientific community, including experts from the field of aeronautics, physics, photographic analysis, and meteorology, up to and including the NASA space program.This is, in effect, a user\'s manual for the correct methodology in applying photography to the study of UFOs.