Position the lens in the camera's bayonet mount, lining up the aperture index on the lens with the lens mounting index on the camera. Twist the camera clockwise until it clicks into place.
To remove, depress the lens release button on the camera and twist the camera counterclockwise.
Note: When mounting the lens on a camera with a meter coupling lever (Al type), make sure that the camera's meter coupling lever is correctly positioned; when mount-
ing on a camera without this lever (non-AI type), "manual" maximum aperture index- ing is required. In both cases, refer to the camera's instruction manual.
Caution: Keep the accessory front leather lens cap in place when mounting or remov- ing the lens and when loading or unloading film. Always replace this cap when the lens is not in use to prevent damage to the lens surface.
AUTOMATIC APERTURE DIAPHRAGM | B |
The Fisheye-Nikkor's automatic diaphragm couples directly to the thru-the- lens meter of the Nikon F3, any Nikon F2 Photomic or other Nikon/ Nikkormat camera for full aperture exposure measurement via a meter cou- pring ridge for Al cameras or a meter coupling shoe for non-AI cameras. The aperture ring has click-stop settings for each full f-stop from f/2.8 to f/22 and can also be set to intermediate openings for more precise exposure. An "aperture-direct-readout" scale is also engraved on the lens to allow direct reading of the aperture setting in suitably equipped camera finders. The procedure for exposure measurement is similar to that used with other Nikkor lenses. For details, see the instruction manual supplied with your camera.
FOCUSINGC
The Fisheye-Nikkor 6mm f/2.8 lens focuses all the way from infinity down to 0.9 foot (0.25m). This means you can focus on foreground objects while throwing the background out of focus or move in close to the subject with- out stopping down the lens.
To focus, look through the camera viewfinder and turn the focusing ring until the image on the screen appears needle sharp. The automatic diaphragm feature and wide f/2.8 maximum aperture guarantee the brightest possible image for viewing and focusing, even in dim light. Depth of field can be observed by simply pressing the camera's depth-of-field preview button; or, refer to the table on page 34.
