The view through a bamboo screen. From moire patterns to black holes

X-ray astronomical imaging methods are discussed that use Moire fringes. The author describes his experiences in designing and operating X-ray astronomical detectors. His first experiment was an instrument flown onboard NASA´s X-=15 rocket and used a rotating metal grid to distinguish between point and diffuse sources. Work on the precise location of various astronomical X-ray sources such as Sco X-1 is also described. The author also describes his work with a modulation collimator on Cyg X-1. Work involved in studying the Crab nebula and solar flares is also described