NIKON AF 14mm f/2.8D ED
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Nikon AF 14mm f/2.8D ED
Main Features
- Hybrid aspherical lens elements and ED glass elements for high-resolution and high-contrast images
- Used as 21mm (converted to 135 format) wideangle lens when attached to the Nikon DX-format digital SLRs
- RF (Rear Focusing) system for fast and smooth optical performance
| ED glass an essential element of NIKKOR telephoto lenses Nikon developed ED (Extra-low Dispersion) glass to enable the production of lenses that offer superior sharpness and color correction by minimizing chromatic aberration. Put simply, chromatic aberration is a type of image and color dispersion that occurs when light rays of varying wavelengths pass through optical glass. In the past, correcting this problem for telephoto lenses required special optical elements that offer anomalous dispersion characteristics specifically calcium fluoride crystals. However, fluorite easily cracks and is sensitive to temperature changes that can adversely affect focusing by altering the lens refractive index. So Nikon designers and engineers put their heads together and came up with ED glass, which offers all the benefits, yet none of the drawbacks of calcium fluorite-based glass. With this innovation, Nikon developed several types of ED glass suitable for various lenses. They deliver stunning sharpness and contrast even at their largest apertures. In this way, NIKKORs ED-series lenses exemplify Nikons preeminence in lens innovation and performance. |
| Nikon Super Integrated Coating ensures exceptional performance To enhance the performance of its optical lens elements, Nikon employs an exclusive multilayer lens coating that helps reduce ghost and flare to a negligible level. Nikon Super Integrated Coating achieves a number of objectives, including minimized reflection in the wider wavelength range and superior color balance and reproduction. Nikon Super Integrated Coating is especially effective for lenses with a large number of elements, like our Zoom-NIKKOR lenses. Also, Nikon's multilayer coating process is tailored to the design of each particular lens. The number of coatings applied to each lens element is carefully calculated to match the lens type and glass used, and also to assure the uniform color balance that characterizes NIKKOR lenses. This results in lenses that meet much higher standards than the rest of the industry. |
| Aspherical lens elements Nikon introduced the first photographic lens with aspherical lens elements in 1968. What sets them apart? Aspherical lenses virtually eliminate the problem of coma and other types of lens aberration even when used at the widest aperture. They are particularly useful in correcting the distortion in wideangle lenses. In addition, use of aspherical lenses contributes to a lighter and smaller lens design. Nikon employs three types of aspherical lens elements. Precision-ground aspherical lens elements are the finest expression of lens-crafting art, demanding extremely rigorous production standards. Hybrid lenses are made of a special plastic molded onto optical glass. Molded glass aspherical lenses are manufactured by molding a unique type of optical glass using a special metal die technique. |
| Distance information D-type and G-type NIKKOR lenses relay subject-to-camera distance information to AF Nikon camera bodies. This then makes possible advances like 3D Matrix Metering and 3D Multi-Sensor Balanced Fill-Flash. Note: D-type and G-type NIKKOR lenses provide distance information to the following cameras: Auto exposure; F6, F5, F100, F90X, F80, F75, F70, F65, F60, F55, F50, PRONEA S, PRONEA 600i, D2 series, D1 series, D100 and D70s/D70. Flash control; F6, F5, F100, F90X, F80, F75, F70, D2 series, D1 series, D100 and D70s/D70. |
Source : http://www.nikon.com
Specifications
| Lens Construction (Elements/Groups) | Picture Angle with 35mm (135) format |
| Picture Angle with 35mm (135) format | Picture Angle with Nikon DX Format |
| Picture Angle with Nikon DX Format | Minimum f/stop |
| Minimum f/stop | Closest focusing distance |
| Closest focusing distance | Maximum reproduction ratio |
| Maximum reproduction ratio | Filter Attachment Size |
| Filter Attachment Size | Dimensions (approx.) (from the camera’s lens mounting flange) |
| Dimensions (approx.) (from the camera’s lens mounting flange) | Weight (approx.) |
| Weight (approx.) | 670g |
