Fast f/1.8 Compact FX-Format Prime Lens This updated classic with a fast maximum aperture is ideal for everyday shooting, perfect in low lighting situations and great for shallow depth of field control, producing images with beautiful background blur. When used on DX-format DSLRs its 35mm focal length equivalency is 75mm. Shoot Tack-Sharp Portraits Every Time Nikon’s Super Integrated Coating (SIC) enhances light transmission efficiency and offers superior color consistency and reduced flare, while an aspherical lens element virtually eliminates coma and other types of aberrations, even when shooting at the widest available aperture. Quiet Autofocus A significant innovation in AF lens technology, Nikon’s Silent Wave Motor uses ultrasonic (inaudible) vibrations-rather than a gear system-to focus the lens, providing incredibly smooth, silent and precise autofocus operation. Quick Switching from AF to MF When fine manual focusing is needed, simply rotate the lens focus ring. M/A mode allows you to seamlessly override the AF system with virtually no time lag.