Although Skip Kohloff has long been one of the guiding forces behind the Colorado Photographic Arts Center, he has almost never allowed his work to be exhibited there. But when he retired from Cherry Creek High last June after 25 years as the head of the school's photography department, he finally let CPAC give him a richly deserved retrospective. And you know what? Denver got what Kohloff deserved, in the compelling déjà-view: A Retrospective Exhibition: R. Skip Kohloff, which examined the photographer's work from the 1970s to the present. The show included nearly 100 photos demonstrating Kohloff's relentless experimentation with the effect of light on his varied subjects. That may sound trite, but not in Kohloff's hands -- or through his lens.