MTF ChartOptical DesignFast FX-format prime lens with ultra-wide 20 mm focal length and bright f/1.8 maximum aperture. Makes an exciting choice for creative photographers who want to exaggerate perspectives. With high-performance optics and compact, lightweight design, this is a versatile lens, well suited to interiors, street reportage, broad landscapes, and underwater photography, or for shooting immersive movie scenes. The fast f/1.8 maximum aperture delivers shallow depth of field, plus smooth bokeh and clear low-light shots. High-performance optics deliver edge-to-edge sharpness with minimal distortion.Fast 20 mm FX-format prime lens (30 mm when used with a Nikon DX-format SLR). Ultra wide-angle: exaggerate perspectives, expand space, and capture immersive images. Ideal for interiors, street reportage, broad landscapes, and underwater photography, as well as for shooting movie footage. Bright f/1.8 aperture: allows for distinctive images with shallow depth of field and beautifully smooth bokeh. Benefit from the flexibility to shoot with faster shutter speeds and attain clear shots in low light, plus a bright viewfinder image. High-resolution images: designed to accommodate high-megapixel sensors, this lens enables stunning photos and HD videos. The modern optical construction ensures high resolution and contrast, and point light sources are reproduced with minimal sagittal coma flare. Superb optical performance: two ED glass elements and two aspherical lens elements ensure crisp, brilliant images. Distortion is exceptionally well controlled for such a wide focal length, and most forms of aberration and colour dispersion are effectively minimised. Nano Crystal Coat: reduces ghosting and flare for greater image clarity, even in backlit situations. Minimum focus distance: 0.2 m. Easily get in close and have subjects fill the frame. Compact and lightweight design: ensures stress-free portability. Sample Image