Field-test of Canon EOS-1N RS AF 35mm SLR camera. In this issue, the focus is on Canon's most unique SLR ever made, the Canon EOS-1N RS AF 35mm SLR camera. Unique? That's right. As opposed to most advanced or most exciting, the EOS-1N RS camera is the most unique model ever produced by Canon. The EOS-1N RS is unique because it uses a semi transparent, hard-coated pellicle mirror in place of the conventional non-transparent mirror found in the other SLR cameras and is fashioned after the standard EOS-1N model. << Back to Main . 1 . 2 . 3 . 4 . 5 . 6 .