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.
