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The fisheye images cover a field of view of 2pi steradians - ie the lens maps the entire hemishphere in front of the camera onto a circular image on the film . The Basic Version of the New Algorithm The idea behind the new algorithm is to reorganize distribution raytracing so that the entire effect of a point in the scene on the film plane is treated as a single unit so that the recorded image is self-consistent in some sense . When I left the Kibbutz in 1990 , quite coincidently , I got a job as a PA on the film " Not Without My Daughter " which was being filmed in Israel at the time . The traditional algorithm searches out into the scene from one point on the film plane at a time and records the discovered scene points only at that one point . After hybridization , the filter is then exposed to an X-ray film ; DNA sequences that complement the probes will produce a line on the film at a position that may be compared to their position on the gel .