Description

SIGMA 20MM 1.4 DG DN ART SONY

 

The ultimate wide-angle lens for astrophotography
Utilizing sophisticated optical design technology, with 17 glass elements arranged in 15 groups, including two SLD, three aspherical glass elements and the largest class double-sided aspherical glass element in SIGMA’s history, the 20mm F1.4 DG DN | Art rigorously suppresses various optical aberrations such as sagittal coma flare and image distortion to produce highly-detailed images with exceptional sharpness and accuracy from the center to the furthest corners of the lens. With its brilliant optical power and its full range of useful features despite its compact and lightweight body, the SIGMA 20mm F1.4 DG DN | Art is the ultimate choice when photographing the night sky.

Lens Heater Retainer
Keep the lens free from night dew by utilizing the built in Lens Heater Retainer. The extended lip at the front of the lens stops an attached lens heater* from slipping over the front element, preventing lens vignetting.

Beautiful bokeh
The wide F1.4 aperture allows for fast shutter speeds and to freeze a subject in frame, while creating beautiful shallow depth-of-filed effects. Take precise control with the clickable aperture ring. An aperture ring click switch is provided to turn off this function for a smooth aperture control system designed for videographers.

Upgraded lens hood
The included petal-shaped lens hood is equipped with a lock mechanism to keep the hood securely fastened to the lens, A rubberized grip area makes it easy to attach and remove the hood in one quick and easy process.

Other Features:

• Inner focus system
• Compatible with high-speed autofocus
• Stepping motor
• Front filter thread (82mm)
• Compatible with lens aberration correction
• Support for DMF and AF+MF
• Compatible with AF assist (Sony E-mount only)
• Super multi-layer coating
• Aperture ring
• Aperture ring click de-click switch
• Aperture ring lock switch
• AFL button*
• MFL switch
• Focus mode switch
• Support for switching between linear and non-linear focus ring settings (L-Mount only)
• Petal-type lens hood with lock (LH878-04)
• Compatible with SIGMA USB DOCK UD-11 (sold separately; L-Mount only)
• Designed to minimize flare and ghosting
• Every single lens is evaluated with SIGMA’s proprietary MTF measuring system
• High-precision, durable brass bayonet mount
• “Made in Japan” craftsmanship

• Specifications:

  • Focal Length: 20mm
  • Maximum Aperture: f 1.4
  • Minimum Aperture: f 16
  • Lens Mount: Sony E
  • Lens Format Coverage: Full-Frame
  • Angle of View: 94.5°
  • Minimum Focus Distance: 9.1 23 cm
  • Maximum Magnification: 0.16x
  • Macro Reproduction Ratio: 1:6.1
  • Optical Design: 17 Elements in 15 Groups
  • Diaphragm Blades: 11, Rounded
  • Focus Type: Autofocus
  • Image Stabilization: No
  • Filter Size: 82 mm (Front)
  • Gel Filter: (Rear)
  • Dimensions (ø x L): 3.5 x 4.4 87.8 x 113.2 mm
  • Weight: 22.2 oz.  630 g

  • What s in the box?

    • Sigma 20mm f 1.4 DG DN Art Lens for Sony E
    • Sigma LH878-04 Lens Hood
    • Sigma LCF-82 III 82mm Lens Cap
    • Sigma LCR II Rear Lens Cap for Sony E • GP-21 Guide Plate