Nikon Z 17- 28mm 2.8Nikon NIKKOR Z 17-28mm f/2.8 - Compact ultra wide-angle zoomThe Nikon NIKKOR Z 17-28mm f/2.8 is a bright ultra-wide-angle zoom for Nikon Z-mount cameras, which has a focal length range of 17-28 mm (25.5-42 mm for DX format) and a constant f/2.8 aperture offers a wide range of possible uses. Weighing only 450 g and measuring 75 x 101 mm, it is very small, handy and light - ideal for travel, landscape, astrophotography or event photography. The optical construction includes 13 elements in 11 groups, including 2 ED glass elements, 1 Super ED element and 3 aspherical lenses, for sharp, high-contrast images with minimal aberrations. The quiet stepper motor (STM) ensures fast, precise autofocus, also perfect for videos, with a close-up limit of 19 cm (at 17 mm). The lens is dust and splash proof, has a fluorine coating on the front lens and a 67mm filter diameter. The 9-blade aperture (f/2.8 to f/22) delivers smooth bokeh. Despite its compact design, it offers very good image quality and is an affordable alternative to Nikon's S-Line lenses.