Macro Lens Macro lenses let us get much closer to a subject than a macro setting on a zoom lens . The optics in macro lenses are also designed to give superb results when shooting close-up pictures.
The challenge of tightly controlling lens MTF is further elevated in zoom lenses – because it is also an optical reality that MTF changes over the focal range of the zoom lens . And again, the optical designers must mobilize further innovative optical design strategies to minimize these changes. The demands on 4K lens design are higher than that of HDTV lenses – because of the anticipated very high bar in image resolution expectations.
A few years ago, Canon had responded to a request from the NHK Technical Research Lab to develop a 10:1 zoom lens to support their ongoing R&D into Ultra- HDTV (or Super HiVision as it is termed in Japan). This 8k lens design stipulated an optical resolution performance that is sixteen times greater than today’s 1080-lineHDTV. From this work was born an optical design platform on which the new 4k cine zooms are based.
1 A Central Technical Underpinning – the Legacy of Developments for 8K UHDTV Some five years ago Canon was requested by the NHK Technical Research Labs to develop a zoom lens that met optical specifications for 8K (sixteen times the resolution of today’s 1080-line HDTV ) in support of their ongoing R&D work on UHDTV (termed Super HiVision in Japan).
