Sigma 20mm f/1.4 DG DN Art Lens for Leica L

The Sigma 20mm f/1.4 DG DN Art Lens, designed for the Leica L-mount, is an ultrawide prime lens that delivers exceptional imaging quality across the entire frame. Its large maximum aperture is particularly advantageous for low-light photography, making it especially effective in dark environments, such as night skies, where its innovative features shine. This lens is a superb option for both landscape and architectural photography, enhanced by newly introduced functionalities that cater specifically to the needs of astrophotographers.

The lens incorporates an optical design complemented by in-camera corrections that effectively manage distortion. It exhibits remarkable control over sagittal coma flare, resulting in sharp, pinpoint stars throughout the image. Furthermore, the inclusion of a Manual Focus Lock (MFL) switch allows the focus ring to be disabled, ensuring that the focus remains constant even after prolonged shooting sessions in cold, dark conditions. Additionally, this lens is designed to accommodate 82mm front filters, which is uncommon for ultrawide primes, and features a rear filter holder that allows for the use of sheet filters to achieve various creative effects.

• As part of the Art line within Sigma's Global Vision series, this lens is designed to achieve truly notable optical performance and is ideally suited for creative and artistic applications.
  
  
• Prime wide-angle 20mm f/1.4 lens is designed for full-frame format Leica L-mount mirrorless cameras and can also be used with APS-C models where it provides a 30mm equivalent focal length.
  
  
• Fast f/1.4 maximum aperture is well-suited for working in low-light conditions and provides greater control over the focus position when using shallow depth of field techniques.
  
  
• Two SLD and three aspherical elements have been incorporated within the lens design to correct for chromatic aberrations throughout the entire focusing range and to ensure exceptional clarity and contrast. This optical design also helps to control distortion and limit vignetting.
  
  
• Employs a concave double-sided aspherical element, which provides outstanding edge-to-edge sharpness and optical performance.
  
  
• Optimized for astrophotography, the lens offers extremely well-controlled sagittal coma flare and limits ghosting.
  
  
• A Super Multilayer Coating has been applied to lens elements to minimize lens flare while producing contrast-rich and color-neutral imagery, even in backlit conditions.
  
  
• Inner focus system powered by precise STM stepping motor provides high-speed autofocus and near-silent operation.
  
  
• Optimized for astrophotography, a new MFL (Manual Focus Lock) switch disables the focus ring, ensuring that focus never changes, even after hours of shooting under chilly, dark skies.
  
  
• Aperture ring with click switch and lock switch prevents accidental aperture changes.
  
  
• A rounded eleven-blade diaphragm helps to produce an attractive out-of-focus quality.
  
  
• Petal-shaped lens hood helps to reduce lens flare when working in strong lighting conditions and offers some protection to the front element of the lens.
  
  
• 82mm front filter threads and rear filter holder for sheet-type filters.
  
  
• Curved lip at the front of the lens keeps an optional lens heater from slipping in front of the lens.
  
  
• Brass bayonet mount for ensured precision and durability.
  
  
• Compatible with optional UD-11 USB Dock for Leica L, which enables fine-tuning different lens characteristics and updating its firmware.