Sigma 20mm f/1.4 DG HSM Art lens real-world review

Sigma 20mm F/1.4 DG HSM Art Lens Real-world Review

Sigma’s new masterpiece, the Sigma 20mm f/1.4 DG HSM Art gets a lot of attention. This time I would like to feature a more real-world oriented review by photographer Tyson Robichaud.

He writes:

The real magic that this lens brings to the table is firstly its speed.  As has been said, nowhere else can you find a full frame lens this wide, this fast.  Considering that for something like astro photography, most lenses in this range, at best, are f/2.8 with the rare exception of an f/2 or f/1.8 UWA (that is up to two full stops faster!) until you hit the 24mm f/1.4 variants.  It’s not just fast for speed’s sake either, it’s pretty darn sharp wide open too.  That in and of itself is reason to consider it.  Add in the optical quality, and relatively modest price and Sigma has continued to not only pressure the big boys, but is kicking ass in the lens game.  Good on you, Sigma.  Keep it coming.

Tyson’s review comes with a lot of sample pics, test pics, and aperture comparison, and it evaluates the Sigma 20mm f/1.4 for astrophotography. If you want a review that tells you how this lens performs in the real world and outside a lab, then Tyson’s review is for you.

Sigma 20mm f/1.4 DG HSM sells at $899: Amazon | B&H Photo | Digitalrev | eBay | Adorama | Canon USA

  • EF Mount Lens/Full-Frame Format
  • Aperture Range: f/1.4 to f/16
  • Two FLD Elements and Five SLD Elements
  • Two Aspherical Elements
  • Super Multi-Layer Coating
  • Hyper Sonic AF Motor, Manual Override
  • Rounded 9-Blade Diaphragm
  • TSC Material, Brass Bayonet Mount
  • Built-In Petal-Shaped Lens Hood
  • Compatible with Sigma USB Dock

Canon patent for EF-M 55-300mm f/4.5-6.3 DO IS lens for EOS M system

JPA_427232674_000002

A long awaited super-zoom lens for the EOS M system with better optics might soon be reality. Canon filed a patent for a  EF-M 55-300mm f/4.5-6.3 DO IS lens, featuring diffractive optics and image stabilisation. Canon already has a telephoto lens for the EOS M, the Canon EF-M 55-200mm F4.5-6.3 IS STM

Such a lens would be a welcome addition to the small lens line-up currently available for the EOS M system. Canon filed other patents for telephoto lenses for the EOS-M system. However, this patent might refer to a a product that could hit the market. If it does, then the price is the what I would like to know first. Optics with DO elements are usually not cheap.

  • Patent Publication No. 2015-232674
    • Published 2015.12.24
    • Filing date 2014.6.11
  • Example 1
    • Zoom ratio 5.27
    • Focal length 55.04 135.00 290.01
    • F-number 4.60 5.18 6.30
    • Angle of view 13.94 5.78 2.70
    • Image height 13.66 13.66 13.66
    • Overall length of the lens 136.00 175.46 192.00
    • BF 35.50 35.50 35.50
[via Egami]