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EF 400mm f/4 DO IS USM
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This lens is an EF 400 f/4.0 DO IS USM lens. |
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Features |
- The world's first multi-layer DO element for telephoto lens
- Small and light
- High image quality
- Image Stabilization for equivalent effect of a shutter speed of two stops faster
- Highly resistant against dust and moisture
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Built to our professional standards with fast AF, full-time mechanical focus and dust and water-resistant construction |
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The EF 400mm f/4 DO IS USM is the worlds first super telephoto lens incorporating "Multi-Layer Diffractive Optical (DO) Element", for camera lenses, and is considered a major breakthrough. The outstanding feature, being its superb ability to correct chromatic aberrations. By incorporating this optical element in the optical design the EF 400mm f/4 IS USM is much smaller and lighter than a comparable lens having conventional optical elements. The Multi-Layer Diffractive Optical Element developed by Canon is a milestone optical element possessing the characteristics of both fluorite and aspherical elements, which has led to the production of high-performance camera lenses. |
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