Sigma 20mm f/1.4 DG HSM lens image and specs leaked

Sigma 20mm F/1.4 DG HSM

Image and specifications of the upcoming Sigma 20mm f/1.4 DG HSM lens for full-frame cameras have leaked at Digicame Info. Announcement is expected for Friday, October 16.

  • Full-frame DSLR
  • Lens construction: 15 sheets group 11
  • Large-diameter aspherical lens
  • Two FLD lens, adopted five SLD lens
  • Correction of magnification chromatic aberration to the limit
  • AF motor HSM. Adopted a new full-time manual mechanism
  • Total length: 129.8mm
  • Maximum diameter: 90.7mm
  • Weight: 950g
  • The diaphragm blades: 9 sheets and (circular aperture)
  • Maximum magnification of 1: 7.1
  • Thorough the flare and ghost measures
  • Design distortion is very small
  • The consideration of the sagittal coma flare
  • Mounts for Canon, Nikon, Sigma
  • Suggested retail price of ¥ 162,000 (approx. $1,300, but real US price will likely be lower)

Canon EF-S 20mm f/2.8 STM lens patent


Canon filed a patent for an EF-S 20mm f/2.8 STM lens. Will this be the next pancake lens for APS-C DSLRs?

  • Patent Publication No. 2015-111192
    • Published 2015.6.18
    • Filing date 2013.12.6
  • Example 3
    • Focal length 20.65mm
    • Fno. 2.88
    • Half angle of view ω = 33.48 °
    • Image height Y = 13.66mm
    • Overall length of the lens 64.00mm
    • BF 35.30mm
  • Canon patents
    • Negative ShiboTadashi
    • The pay-out the entire
[via Egami]