We have defined the optical Nyquist frequency for a 4 K S 35 mm lens. It means that this lens needs to be able to pass through its entire optical system 80 black and white lines within every millimeter of the image size defined in Figure 1. To get a sense of the high demand of a 4K lens we show in Figure 2 below what 80 line pairs looks like.
To the customer who purchased CN-E70-200 mm T4.4 L IS KAS S : NOTE: When using the lens with the extender, be sure to adjust the back focus of the lens after attaching the extender.
Nor should it be forgotten that Canon long ago developed and manufactured 35 mm cine lenses for motion picture film – that won an Emmy back in the 1970 s . That was flanked by an even longer history in producing lenses for 16mm and Super16mm motion picture film cameras.
