An ultrawide Leica L-mount prime, the Sigma 20mm f/1.4 DG DN Art Lens Leica Loffers incredible imaging performance from corner to corner, with a large maximum aperture that makes it ideal for use in low-light environments, particularly under dark skies where its new features are especially useful. Always an excellent choice for landscape and architecture, this lens is equipped with newly updated functions especially useful for astrophotographers.

Combining an optical design with in-camera corrections that keep distortion under control, this lens offers an extremely well-controlled sagittal coma flare that yields pin-point stars from edge to edge. Additionally, a new Manual Focus Lock (MFL) switch disables the focus ring, ensuring that focus never changes, even after hours of shooting under chilly, dark skies. The lens has also been developed to accept 82mm front filters, a rarity on ultrawide primes, and another unique feature includes a rear filter holder, which accommodates sheet filters for various creative effects.

L-Mount Lens/Full Frame Format    Aperture Range: f/1.4 to f/16    Two SLD Elements    Three Aspherical Elements    Super Multilayer Coating    Stepping AF Motor, MFL Switch    Rounded 11-Blade Diaphragm    82mm Front Filter Thread    Rear Filter Holder    Durable Brass Bayonet Mount

• 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.

Related Questions and Answers

Q: 1. Will this work with a Nikon d800

A: Yes, the Sigma 20mm f/1.4 DG HSM Art Lens for Nikon F (B&H# SI2014N) is fully compatible with the Nikon D800 Digital SLR Camera (Body Only) (B&H# NID800).

Q: 2. How is the manual focussing for this lens?

A: Sigma 35mm f/1.4 DG DN Art Lens for Sony E has a physical switch to turn off the lens Integrated stepping motor which allows smooth and internal manual focus. If you wish to focus manually, set the focus mode switch on the lens to the “MF” position. You can adjust the focus by turning the focus ring

Q: 3. I have the Nikon D750 and want to see if anyone has used this Sigma lens with that camera and if they are fully compatible?

A: Thank you for your interest in Sigma products. The 20mm f/1.4 DG HSM Art Lens for Nikon F is compatible with the Nikon D750.

Q: 4. Does it have linear acceleration response MF?

A: Yes, Sigma 20mm f/1.4 DG DN Art Lens for Sony E has the same linear accelatation when the lens is set to manual focus.

Q: 5. the sigma 35 mm says it s weather sealed, is this 50 mm weather sealed as well?

A: Yes, the Sigma 50mm f/1.4 DG DN Art Lens (Sony E) is weather sealed from dust and splash resistant.

Q: 6. Will this lense work on an SL1?

A: Yes, this lens is compatible with the Rebel SL1.

Q: 7. Does this lens have image stabilization?

A: Yes... I use a Sony A7ii with this lens and it is compatible with Sonys image Stabilization.

Q: 8. Can I use a mattebox with that lens diameter?

A: The front of the Sigma 20mm f/1.4 DG HSM Art Lens for Canon EF is 3.57" / 90.7 mm in diameter. As long as you have a matte box that can fit over that, it will work.

Q: 9. is this go with sony alpha 6700?

A: Yes, the Sigma 20mm f/1.4 DG DN Art Lens for Sony E is compatible with the Sony A6700.

Q: 10. Can this lensbe made to work Can this lens be made to work with a Canon DSLR? If not, any plans to make one for a Canon DSLR?

A: No, the Sigma 20mm f/1.4 DG DN Art Lens for Sony E will not work on a Canon DSLR. The Sigma 20mm f/1.4 DG HSM Art Lens for Canon EF will work on Canon DSLR cameras. B&H # SI2014C