User manual NIKON AI-S MICRO-NIKKOR 105MM F/2.8

[. . . ] And of course Nikon has assured good performance from infinity down to the closest focusing distance (0. 34ft) with a 1:2 reproduction ratio, even at full aperture, with its Close-Range Correction System. With NIC (Nikon Integrated Coating) applied to the air-to-glass surfaces of the lens element, not only do you avoid ghost images and flare, but color rendition is also improved. And with suitably equipped Nikon cameras, this lens offers "Automatic Maximum Aperture Indexing" (AI), permitting full aperture exposure measurement through the dual functioning of the meter coupling ridge and automatic diaphragm. [. . . ] At high reproduction ratios, depth of field is extremely shallow; it's best, therefore, to preview before actual shooting. One way to do this is to press the depth-of-field button on your camera and the lens will close to the preselected aperture, showing you how much background and foreground is in focus. Another way is to read the color-coded indicators inscribed on the lens barrel. The pairs of colored lines on either side of the distance index line correspond to the f/numbers of the same color on the aperture scale. At close distances, however, so little is in focus that it may be more useful to check the depth-of-field tables on pages 32 and 33. The reproduction ratio is, numerically, the relationship between the image size (to be recorded on the film) and the actual subject size. For example, if the image on the focusing screen is one-fifth the actual subject size, the reproduction ratio is 1:5. Two reproduction scales are inscribed in orange above the distance scale on the focusing ring. The inner scale, with figures from 1:10 to 2, represents reproduction ratios obtained when the lens is used alone. 88) represent possible ratios when the lens and PN-11 ring are used together. Using either of these scales, you can photograph at a predetermined ratio without calculating distances. For example, to photograph at a reproduction ratio of 1:5, just turn the focusing ring until the number " 5 " is aligned with the distance index line; then aim at the subject and adjust your position (closer to, or farther away from the subject) 9 NOTES ON CLOSE-UP Camera shake When shooting close-ups, you will probably encounter some special problems not found in general photography. One is sensitivity to vibration-image magnification is so high that even the slightest movement during shooting will cause a blurred image. To avoid this, we recommend the use of a tripod with a cable release to activate the shutter. For this purpose, the 360° rotatable tripod mounting collar on the PN ring will prove useful. AND DUPLICATION WORK limited when the PN-11 ring is used for reproduction ratios from 1:2 to 1:1. The recommended f/number scale engraved above the reproduction ratio scale indicates best results. Close-up photography with bellows attachment When using a bellows attachment, focus by turning the lens focusing ring to a closer distance setting, without lengthening the bellows extension. If bellows extension is required for reproduction ratios from 1:2. 2 to 1:1, stop the lens down, referring to the recommended f/number on the lens barrel. €¢ The lens should be focused to as close a distance as possible for good results, even if the lens is used in reverse position. €¢ For a predetermined reproduction ratio, the extension value of the bellows attachment is calculated by the following equations: bellows extension reproduction ratio = — — ; focal length A 1:2 reproduction ratio is achieved with the lens set at its closest distance setting (with approx. [. . . ] *** The figures shown here represent the ranges obtained with the subject on the baseplate, using the lens without any close-up attachment. 6 29 CLOSE-UP TABLES/TABLAS DE ACERCAMIENTO Table 1/Tabla 1 Lens in normal position Objetivo en posicion normal Reproduction Focused Subject distance ratio field Relacion de Campo Distancia reproduccion abarcado de enfoque 32. 9 Lens in reverse position Objetivo en posicion invertida Focused Reproduction Subject distance ratio field Relacion de Distancia Campo de enfoque abarcado reproduccion Close-up attachment Accesorio de acercamiento Closed-Up Lens No. 0 - - - 30 * Los primeros valores son para el anillo Kl usado * The first values are for the Kl ring used alone solo, y los segundos para todos los anillos usados and the second ones for all five rings used a la vez. [. . . ]