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| Nikon TC-E3PF (Phase Fresnal) 3x Auxiliary Tele Convertor Lens for Coolpix 8400 Digital Camera. |
| Category: Hardware |
Date: 05-09-2005 |
The TC-E3PF is an advanced 3x telephoto converter born of unique Nikon technology for use with the new 8-megapixel COOLPIX 8400. Smaller and lighter, the TC-E3PF illustrates how Nikon is taking existing lenses and redesigning them for go anywhere convenience. In conventional telephoto converters, a lens with a pronounced convex shape is used to refract the light received through the first element to a greater degree. This results in the desired reproduction ratio, however chromatic aberration can occur. In the event that a convex ED lens is used, such chromatic aberration is corrected, however the refractive limitations of such a lens make it difficult to reduce overall dimensions. Through its superior understanding of optical technology, Nikon has succeeded in innovating a new kind of lens with a design that enables lower prices through more efficient mass production. Based on the Phase Fresnel lens (pronounced Fray-nell) a lens which appears to have a series of concentric circles engraved onto it and which has a jagged surface in cross section the new TC-E3PF is made possible by fusing two such lenses together, and succeeds in correcting any chromatic aberration to the same high degree as an ED (Extra-low Dispersion) glass lens while simultaneously achieving a reduction in overall body length. As a result, the lens is made smaller and carrying becomes significantly more convenient. The PF lens also offers additional advantages ar |
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