The S-mount ciné lens mount was originally developed by Kodak and introduced in 1933 for the Ciné-Kodak line of movie cameras. The only camera body sold by Kodak with a native S-mount was the Ciné-Kodak Special II.
Characteristics and applications According to historian Doug Kerr, the S-mount was developed and released in 1933 to simplify the profusion of lens mounts for the line of Ciné-Kodak 16 and 8 mm movie cameras; at the time, many of the lens mounts were unique to the particular camera model, and the line of Kodak ciné lenses for 16 mm cameras spanned a range of focal lengths from 15 to 152 mm. It was not efficient to maintain an adequate stock of optically identical lenses with multiple mounts. The S-mount uses a mixture of bayonet and threaded attachments; a locating pin on the lens fits into a matching slot on the camera body or adapter to ensure proper rotational orientation, and then a captive, threaded collar on the camera or adapter is rotated to engage corresponding threads on the lens, securing it.
+Kodak adaptors for S-mount Ciné-Kodak lenses colspan=2 15 25, 40, 50, 63 50, 63, 102 152 Ciné-Kodak Model K H R J Model E () A Magazine Ciné-KodakMagazine Ciné-Kodak Eight, Model 90 M Ciné-Kodak Special G P F Ciné-Kodak Special II colspan=4 (native) C mount(incl. Cine-Kodak K-100) C D mount(incl. Ciné-Kodak Reliant, Medallion) D
Although the S-mount was introduced in 1933, it was not fitted natively to a camera until the Ciné-Kodak Special II, which was manufactured from 1948 to 1961. S-mount lenses can be fitted to other ciné cameras using the appropriate adapter; for example, the 25 mm S-mount lens can be mounted on a Ciné-Kodak Special using a Type P adapter. For the Ciné-Kodak Special and Ciné-Kodak Model K, since the front part of the viewfinder is built into the lens mount, there are multiple adapters which have identical mechanical interfaces, but carry different sets of viewfinder optics and mask(s). Other cameras, including the Ciné-Kodak Special II, made the front viewfinder optics a separate accessory bundled with the lens.
List of lenses Lenses released by Kodak for Ciné-Kodak cameras include: +Kodak lenses for Ciné-Kodak 16 mm and 8 mm cameras F.L. (mm) Name Aperture Constr. Min. focus Angle of view 8 mm 16 mm S-mount Filter Notes 9 Ektanon 25.9° × 19.6° Ser.V 13 Ektanon 19.4° × 14.6° Ser.VI Kit lens with many Ciné-Kodak Eights Anastigmat 4e/4g Ser.V Earlier lens Anastigmat 3e/3g fixed 18.7° × 14.1° Anastigmat 3e/3g fixed 19.7° × 14.9° 15 Ektar 34.0° × 25.7° Ser.VI Ektanon Anastigmat 3e/3g Earlier lens; some marked as -in. Fixed-focus version takes Series V filters. 25 Ektar 7e/4g(Double Gauss) 21.5° × 16.2° Ser.VI Ektar Later lens Anastigmat 4e/4g Ser.V Earlier lens; some marked as 1-in. 38 Ektanon 6.6° × 5.0° Anastigmat 4e/2g Earlier lens; some marked as 1-in. Ektanon 6.5° × 4.8° D-mount lens 40 Ektar 13.7° × 10.3° Ser.VI 50 Ektanon 10.8° × 8.1° Ser.VI Anastigmat 4e/2g Earlier lens Anastigmat 3e/3g(Cooke triplet) 10.9° × 8.1° Ser.V Earlier lens; some marked as 2-in. 63 Ektar 8.7° × 6.5° Ser.VI Ektanon Anastigmat 4e/2g Earlier lens, some marked as 2-in. 76 Telephoto Anastigmat 4e/2g 7.2° × 5.4° Ser.V Earlier lens, some marked as 3-in. 78 Telephoto Anastigmat 7.2° × 5.4° Ser.VI Model B only 102 Ektar 4e/2g 5.4° × 4.1° Ser.VI Ektanon Anastigmat Ser.VII Earlier lens, some marked as 4-in. 114 Telephoto Anastigmat 4e/2g 4.8° × 3.6° Ser.VI Earlier lens, some marked as 4-in. 152 Ektar 3.6° × 2.7° Ser.VI Ektanon Telephoto Anastigmat 4e/2g Ser.VI Earlier lens, some marked as 6-in.
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