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Phone: Professional Broadcast Lens Repair Form Contact I nformation
High-end professional lenses can anticipate a long working life – of the order of a decade or more. This puts a unique context on expectations for contemporary 4K lenses. Such a lens must anticipate a wide range of productions – including theatrical motion pictures, major television dramas and episodics, commercials, and a diverse range of non-entertainment origination.
CMS-XML Definition: Wide-Angle Lens
Wide-Angle Lens Wide-angle lenses help us capture the big picture. They are commonly used for landscape and interior photography, when we want to photograph a large part of the scene and get the elements in a scene in focus.
CMS-XML Definition: Macro Lens
Macro Lens With macro lenses, depth-of-field is relatively shallow, so extra carefull focus and the use of a tripod or a ring light is recommended. Many professionals typically shot most of their close-up images at small apertures such as f/16 or f/22, for the greatest sharpness from in fromt of the subject to behind it.
Studying how each of these lenses convoluted with the Canon CMOS image sensor and allied Canon CFA helped establish overall color reproduction benchmarks that guided the subsequent exploration of the new Canon cinema lens spectral response. Video processing – in the form of the digital linear matricing system – was also optimized. The judgment of color balance was made by Canon color scientists in concert with invited directors of photography studying the simulated imagery.
Canon’s optical design teams spent a considerable time using powerful computer aided simulation tools to explore the possibilities in reconciling very high 4K specifications with a variety of novel design strategies that would collectively contribute to a unique Canon Personality in the new cine zoom lenses. That extensive exploration examined all aspects of lens image quality parameters and image aberrations and distortions in a prolonged search for an aggregate performance that would speak to the urgings of those with whom we had consulted.
The curves shown in Figures 4 and 5 are the final computer simulated results prior to the lenses actually being built. Canon does not publish actual MTF curves for its high-end professional lenses (a universal practice among all major optical manufacturers). However, it can be said that the actual results achieved in both the CN-E14.5–60mm and the CN-E30–300mm slightly exceed the computer predictions.