Nikon is harnessing camera lens technology to upgrade progressive lenses in its eyewear, improving contrast and giving wearers clearer vision. Nikon began making spectacle lenses in 1946, when it ...

Canon’s MTF charts give results at two apertures: wide-open (the lower black pair), and stopped down to f/8 (the upper blue pair), with the lens set to infinity focus. MTF charts from Nikon and Sigma ...

Long ago, engineers established that visual picture sharpness must be correlated with what is called the modulation transfer function of the lens-camera system. A typical multiburst resolution chart ...

One very noteworthy point is that the MTF figures are virtually the same right ... The taller the column, the better the lens performance. CA (Chromatic Aberration) is measured with in-camera ...

Therefore, if a lens is very sharp in the center, but suffers in the corners, the MTF chart will illustrate this with a drop in the graph. Cicala continues: “This is a spectacular performance ...