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Sigma 20mm f1.4 DG HSM Art lens

Sigma is expected to release a new 20mm f/1.4 DG HSM Art lens this Friday (October 16th), confirmed by various sources. We will be sure to announce this new release on Friday if the rumors are true. In the meantime, here is the information we have so far:

  • Designed for DSLR cameras (full frame)
  • Lens construction: 15 elements in 11 groups
  • One double-sided large-diameter aspherical element
  • Two FLD elements and five SLD elements for better correction of chromatic aberrations
  • HSM autofocus motor (in-lens!): New mechanism for full-time manual override in autofocus mode
  • Total length: 129.8mm
  • Maximum diameter: 90.7mm
  • Weight: 950g
  • 9 diaphragm blades, rounded
  • Maximum magnification: 1:7.1 (0.14x)
  • Designed to minimize ghosting and flare
  • Ultra low distortion
  • Designed to minimize coma aberration
  • Available in Sigma, Nikon, and Canon mounts
  • Suggested retail price in Japan: ¥162,000 (US price may be lower, close to $1,300)



  • EnKiu

    I am actually quite excited about this and I hope it is very good and affordable.

    The reason is the Sigma SD1 Merrill. On the APSC sensor this will give 30 mm equivalent which is close enough to the Sigma DP1 at 28.5mm equivalent. The added advantage on a crop sensor is that the corner performance will be even better. While not exactly so, this is a match for a wide landscape lens for a crop sensor.

    I think this is not as crazy as it might sound at first, making another lens very close to the existing 24mm Art, *IF* you consider that this one might also be aimed at crop sensors. I certainly prefer this to even an Art zoom 🙂

    My only remaining question is if I should get the 24mm or 35mm for my new Sigma SD1 Merrill (loved the DPs Merrills so much, I decided to get the SD1 before it disappears) for the middle focal length (let’s say to match the DP2).

    • Russell Ferris

      I’ve got the 24-35 and it is magical

      • EnKiu

        What camera are you using with the 24-35 mm? I bought the 18-35mm as a “kit lens” with my new SD1 (I literally just got it).

        I did not consider the 24-35mm lens because its reviews stated that while it is very good, it does not match a prime lens quality (kind of course for a zoom). However, the 18-35 mm is often described as a zoom with prime quality.

        How would you judge the 24-35 mm in comparison to the primes? Can you compare it to the 18-35 mm?

        • Russell Ferris

          I have the 50mm and 85mm 1.8 af-s lenses, they are not as bright or as sharp. The CA is much nicer and compared to the nikkor 14-24 the story is the same. The 85 may be sharper but only in the plane of focus.

  • Loopyumpa

    Where is the 85 1.4 Art?!?!?!

  • Pawel

    Good to see theyre producing more fabulous art lenses (assuming this one will be great) but personally would’ve preferred wider.

    • EarlFargis

      I have a feeling they will get around to wider someday. Lenses keep dribbling out of Sigma. 85mm seems to be the biggest cry from folks here and Nikon Rumors followed by maybe a 135mm so I imagine a short tele must be crawling up Sigma’s priority list.

  • EarlFargis

    Sweet. If I didn’t already own the Nikkor 14-24mm f/2.8 this would be in my bag. Well… soon in my bag. ;^)

    • Russell Ferris

      I’m in the same boat, no sense in thousands of dollars worth of redundancy.

  • Flower

    i’m hating Sigma, who will buy an expensive 20mm now? Release a damned 85mm ART and take my fu*king money!!!

    • Sid

      I will buy this lens! It’s my favorite focal length…and f/1.4…OH MY!

    • David

      I will buy an expensive ($899, not that expensive compared to most Canon’s) 20mm!

  • Russell Ferris

    This is what the 24 should have been.

    • Jo Jundt

      What? Heavier? Longer? Bigger Diameter? More 20 mm? Throwing in such a sentence without explanation appears a bit cheap.

      • Russell Ferris

        24mm 1.4 is nothing new, lackluster even compared the zooms. 20mm 1.4 is a much more unique offering and has my attention.

        • Jo Jundt

          There’s already a new Nikon 20/1.8 G ED N – half stop less, but same FL – so what’s the new thing? Half stop faster and nearly 3× the weight? Well, everybody his own preferences. I just think, Sigma should go longer with their primes. 3 wide angle, no tele?

          • Russell Ferris

            I completely agree they should have released a tele to give their 24mm f1.4 time to mature.

          • EnKiu

            The world is not limited to Nikon cameras.

            In regards to the weight vs the Nikon, it all depends on the final image quality. Lower weight is of course desirable, but not always if it comes at the cost of image quality.

            Plus, like I said above, the 20mm Art is a good match for landscape lens for crop sensors.

          • Jo Jundt

            I was too lazy to look over in the Canon sites. Essence of my post was: the fast 20 is nothing so unique, that one could say “that’s what the 24 was meant to be”. Next thing is: If I carry all Sigma primes I already have, it’s 2.3 kg in my bag without body. I don’t think I get another 1 kg for just 4 mm shorter than the wides prime and still have to add some Nikon tele. I also don’t think I see this lens as replacement for my 14-24 – it had to be a lot sharper and then there’s still a huge gap down to 14 mm while the difference between 20 and 24 is not very obvious.
            Don’t get me wrong, as always it’s nice to have choices. But it’s nothing wrong with going longer FL choices as well! Right now, the Art lenses cover


            I find the overweight in wide too strong and as great as the 24-105 is: It’s not a fast bokeh machine.

          • EnKiu

            are you sure that you are comparing like for like? Can you get all this from a chart?

          • Jo Jundt

            No, you’re right, Different manufacturers, different charts and MTF is just one property. Also, at f/1.8 or f/2.8 the Sigma chart will probably come appear equally or slightly better to the Nikon and Zeiss. Still, the other numbers (price, weight and size) are comparable and remain to my question “what can this lens do better than the already existing ones to justify it’s cost and dimensions?”

          • Russell Ferris

            The 14-24 I lug around sometimes was a huge compromise in size and weight, it comes with the 35mm format. I wouldn’t use either the 14-24 or 20 as a walk around lens, you have to be deliberate with large lenses.

  • Jo Jundt

    Half year later they will come out with a 14-24/2… Can I sign somewhere for an 85/1.4 A? 😀

  • Jack@Finland

    Why 20 mm, why not 16 or 17 mm?!

    • GB

      While I, personally, would have definitely preferred a 16 / 1.8A, 17 / 1.8A, or 18 / 1.8A to better complement the 24 / 1.4A, a 20 / 1.4A makes sense as an update of their 20 / 1.8.

      The thing is, however, as a very happy owner of the 24 / 1.4A, 35 / 1.4A, and 50 / 1.4A, it is rather close to the 24 / 1.4A. So, if they release a 28 / 1.4A, then a 20 / 28 / 50 trio might be more appealing than the more narrow 24 / 35 / 50 trio for many.

      But the main thing is that it’s supposed to be well controlled for coma. If they do a better job than they did with the 24 / 1.4A (which wasn’t tip-top in that regard until f/4), then this lens should be the dream lens astrophotographers have been waiting for.

    • Russell Ferris

      If they released a 16mm f1.4 why would any bother with this 20mm? It’s kinda the same with their 24mm they gave very little time to mature.

    • Phred

      Because 16 or 17mm is too wide…this is just PERFECT!

  • Jack

    85mm f/1.4 Art, please!!!

    • GB

      Maybe they’ll even make an 85-135 / 2A (although I doubt it).

  • Greggory Burt

    I’m confused, didn’t they just release a 24mm?

    • Jeffry De Meyer

      At the wide end a few mm more or less make a big difference.
      So this is a valuable addition to the line up.

      I wish they would start releasing some lenses at the long end

    • Also, a lot of astrophotographers were hoping the 24mm Art would be great, but for that purpose, the coma on the 24mm just wasn’t worth it compared to a Rokinon. This lens, on the other hand, looks like it’s got special attention to reducing sagittal coma flare.

  • Russell Ferris

    Oh my lanta

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