Nikon has announced the Nikkor Z 135mm F1.8 S Plena lens, which is said to be optimised for out-of-focus highlights, after teasing the new model on YouTube. The Plena lens adopts 16 elements in 14 groups and includes one element using a relatively new type of glass from Nikon called an SR (Short-wavelength Refractive) element: “Nikon’s original SR (Short-wavelength Refractive) lens is a high- and specialized-dispersion glass lens featuring characteristics to greatly refract light with wavelengths shorter than that of blue. By controlling short-wavelength light that is difficult to compensate, light of various specific wavelengths can be more effectively collected achieving highly precise chromatic aberration compensation. Because this lens can…