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The Cirkut is a rotating panoramic camera, of the type known as "full rotation". It was patented by William J. Johnston in 1904, and was manufactured by Rochester Panoramic Camera Company starting in 1905; during that same year, the company was acquired by the Century Camera Co. (which itself was owned by Eastman Kodak at the time). Manufacture of the camera continued through 1949.

There were several models: No. 5, No. 6, No. 8, No. 10, and No. 16, named according to the maximum width of the film accepted, in inches. The length of film (corresponding to the width of the panorama), varied by model also, ranging up to for the No. 16, yielding a single negative with an area of more than . Thus, the information content of Cirkut images can be in the gigapixel range.

Cirkut (record producer)

Henry Russell Walter, known professionally as Cirkut, is a Canadian record producer and songwriter. Described by The Hollywood Reporter as record producer Dr. Luke's "right-hand man and main production partner", he has co-produced and co-written for Jessie J, Britney Spears, Kesha, Rihanna, Shakira, Nicki Minaj, B.o.B, Lil Wayne, and Taylor Swift, including the Billboard Hot 100 No. 1 singles, " Part of Me", " Roar", and " Dark Horse" by Katy Perry, and " Wrecking Ball" by Miley Cyrus.