Incredible sharpness meets powerful zoom in one easy to use package. The Nikon FM 24-70mm features all-metal design for a rock solid feel during the longest shoots. Simple manual focus switching puts you in total control in any situation, while quiet, smooth auto-focusing is perfect for day-to-day photography. Highlights: Constant maximum aperture of f/2.8 at all focal lengths. Enhanced optical formulas, engineered to produce exceptional sharpness, contrast and colour, render outstanding image integrity. ED (Extra-low dispersion) glass elements minimize chromatic aberration to deliver stunning sharpness and contrast. Aspherical lenses including large-diameter PGM element eliminate various types of lens aberration even at the widest aperture. Nano Crystal Coat virtually eliminates internal lens element reflections, effectively reducing ghosting and flare. High-performance Nikon Super Integrated Coating offers superior color reproduction, while minimizing ghosting and flare. IF (Internal Focusing) enables focusing without changing the length of lens barrel. Nikon's exclusive Silent Wave Motor for fast, quiet autofocus operation. Rounded diaphragm opening (9 blades) makes out-of-focus elements appear more natural. 0.38 m/1.2 ft. closest focusing distance with focal length 35-50mm. Filter attachment size of 77mm. M/A mode enables instant switching from autofocus to manual focus, even during AF servo operation, with virtually no time lag. Dedicated flower-shaped lens hood effectively minimizes stray light. Lens barrel is built for comfortable holding while featuring a rugged design; zoom and focusing rings provide smooth operation. Engineered to Nikon professional D-SLR standards to effectively resist dust and moisture. Compatible with Nikon FX and DX formats.