User manual NIKON AI-S ZOOM-NIKKOR 25-50MM F/4

[. . . ] Both zooming and focusing are accomplished through two independent rings—minimum focusing distance is 0. 6m , Multilayer Nikon Integrated Coating on all air-exposed lens surfaces helps reduce reflection , thus minimizing flare and ghost to insure greater image contrast and color rendition. [. . . ] Those which are recommended for use with this Zoom-Nikkor 25-50mm f/4 lens are listed below. < W i F3 F 2 J i e r ^ n A L B C D E Gl G2 G3 G4 HI H2 H3|H4 J K P M R T 0 0 0 s O a 0 o 0 a o , 5, • When the Teleconverter TC-200 is attached to this iens, use the following table: C«mora —• ____ A/L B c D E Gl G2 G3 G4 HI H2 H3 m J K/P M R T F3 F2 • • 0 a 0 a • • • • •• ' Teleconverters TC-14 and TC-300 can't be used with this lens. O = Acceptable focusing Slight vignetting (or moire phenomenon in the case of the microprism) affects the screen image. The image on the film, however, shows no trace of this. With Photomic-series finders, - V j in the table above means that the film speed (ASA/ISO) should be set against the proper compensating mark as shown in the diagram. When no exposure correction is indicated, the film speed (ASA/ISO) in use should be opposite the • index. ZOOMING C To zoom in or out, simply turn the zoom ring until the desired composition is tramed on the focusing screen. The ring has a four-position scale showing which of five focat lengths—25mm, 28mm, 35mm, 40mm and 50mm—is in use in case you want to preset the lens to any of these focal lengths. Caution: Slight vignetting will occur when you shoot with the lens at a small aperture, at its closest focusing distance and at a wide angle focal length. DEPTH-OF-FIELD SCALE Unlike other Nikkor lenses, the Zoom-Nikkor 25-50mm f/4 has no color-coded depth-of-field indicators engraved on the lens barrel. However, you can still determine the depth of field by using the scales provided with this pamphlet. To use, first cut out the scales along the lines indicated. [. . . ] 10 SPECIFICATIONS Focal length: 25^50mm Maximum aperture: f/4 Lens construction: 11 elements in 10 groups Picture angle: 80°40' ^47°50' Distance scale: Graduated in meters and feet from 0. 6m (2 ft) to infinity («) Zooming control: By independent zooming control ring with rotation of 83°; reference marks provided for focal length settings of 25mm, 28mm, 35mm, 40mm and 50mm Focusing control: Independent focusing ring with total rotation of 73*30' Aperture scale: t/4<M/22 on both standard and apeiture-direct-readout (ADR) scales Diaphragm: Fully automatic Exposure measurement: Full-aperture method adopted; meter coupling ridge provided for coupling with Al-type cameras, and meter coupling shoe for non-AI cameras Attachment size: 72mm (P = 0. [. . . ]