Sigma GF 24mmF2 Lens Patent for Fujifilm GFX

Back in 2023, Sigma’s CEO said that Fujifilm GFX users would be their ideal customers, while also making it clear that Sigma had no plans to produce G-mount lenses at the time.

Then in 2024, the tone changed. Sigma’s CEO stated that if Sigma truly wants to become the “master of optics,” it would eventually need to make lenses for the Fujifilm GFX system.

That statement raised expectations that Sigma GFX lenses could arrive sooner rather than later. However, in 2025, the message shifted once again: Sigma currently has no concrete plans, and GFX lenses are something that might happen “maybe in the distant future.”

So, what’s the situation now?

A newly surfaced Sigma patent may provide a small but interesting clue.

The patent describes an optical design for a 24mm f/2 lens that appears to cover a sensor larger than full frame. Based on the technical specifications, the Japanese website Asobinet speculates that this design could be intended for Fujifilm GFX (44×33mm).

And the fact that Sigma is even investigating and patenting optical designs for GFX-sized sensors is noteworthy.

It suggests a few things:

  • The GFX system’s market share is growing, possibly approaching a point where Sigma sees long-term potential
  • There likely isn’t any “mount protection” preventing third-party manufacturers from producing G-mount lenses, meaning Fujifilm appears open to external lens makers

These are undeniably positive signals.

However, a strong reality check is needed. Over the years, I’ve shared hundreds of patents on FujiRumors. Only once did I spot a patent before it turned into a real, shipping product. In all other cases, patents either surface after a product is announced—or never materialize at all.

We’ve seen this countless times:

So while today’s Sigma patent is encouraging—especially because it shows third-party interest in the G mount—it does not mean Sigma GFX autofocus lenses are just around the corner.

For now, this is best seen as a first signal, not a promise. The road to third-party G-mount AF lenses may still be long—or may never happen at all.

Patent Details

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Sigma CEO Expresses Interest in Fujifilm GFX Support: “If We Want to Master Optics, We Need to Support Medium Format”

image courtesy: sigma-sein.com
image courtesy: sigma-sein.com

In an interview to Petapixel, Sigma’s CEO, Kazuto Yamaki, has expressed personal interest in supporting medium format cameras with the company’s lenses.

While Sigma has focused on building its lens lineup for full-frame mirrorless cameras, Yamaki acknowledges the growing popularity of medium format cameras and the potential for third-party lens manufacturers to enter this market.

Although there are currently no official plans to support medium format, Yamaki stated that it is his personal hope, and he emphasized the need to carefully assess the market and demand.

Here are the relevant quotes from the article:

I [am] personally very much interested in supporting medium format. Again, it’s a small market, but I have some interest.

[…]

So right now we don’t have such plan, but if Sigma wants to be a master of optics, I think we need to support medium format. But that’s just personal hope. But I need to carefully look at the market and demand

Fortunately, the CEO’s personal opinion holds significant influence, perhaps more than any other within the company. These statements indeed inspire optimism.

Additionally, it is now evident that Fujifilm has not restricted the G-mount to third-party manufacturers. If this were the case, Sigma would have publicly expressed their concerns, just as they did previously when they complained about Fujifilm not permitting them to produce X mount lenses.

It’s only an issue of market share. And luckily the Fujifilm GFX (and also Hasselblad X system) market share is growing.

You can read the full article at PetaPixel here (image from sigma-sein.com)

 

Sigma CEO:” Fujifilm GFX Users Would be Our Ideal Customers, but so far No Sigma GFX lenses Planed” and Sigma 10-18mmF2.8 DC DN

image courtesy: Phototrend
image courtesy: Phototrend

Sigma & Fujifilm

The French website Phototrend had the opportunity to interview Sigma CEO Kazuto Yamaki.

The Sigma CEO briefly talks about the new Sigma 10-18mm f/2.8 DC DN Contemporary and a mention also goes to the Fujifilm GFX system.

Here is a quick summary mainly of the Fujifilm related stuff:

  • for 2-3 years (during Covid), high-end lenses were very popular
  • recently, perhaps because of inflation, people have begun to look for the right balance between performance, quality and price
  • I think that this trend will be even more marked in the coming years.
  • if the new Sigma 10-18mm f/2.8 would have been designed as an ART lens, it would have been larger
  • but since it is a Contemporary lens, Sigma looked for the right balance between performance, weight and compactness
  • the 10-18 mm uses the camera corrections. This is one of the reasons why we were able to make it compact
  • in camera correction is very effective especially for distortion and vignetting. It is very difficult to see the difference [with an optical corrected lens] on a small image
  • if you print big, then the difference would be more noticable
  • If the lens has vignetting, the bokeh in the shape of a cat’s eye may be exaggerated
  • Thus, if customers are really concerned about the quality of the image, they should also care about the quality of the lens
  • currently no plans to offer lenses for the GFX system
  • GFX users would be ideal customers for Sigma, because they are professional or passionate photographers
  • But Sigma’s engineers are working hard on many projects, and Sigma’s resources are limited
  • making lenses for GFX is a possibility that the Sigma CEO would like to continue to explore
  • but so far no plans for GFX lenses from Sigma

The full interview, that covers much more, can be checked out in French at Phototrend here.

Sigma 18-50mm f/2.8 for Fujifilm X mount Listed at Stores – Announcement Imminent?

Sigma told us many months ago here, that the Sigma 18-50mm f/2.8 for Fujifilm X mount will come in December.

Well, it seems it is about to happen as the first stores started to list it on their websites.

The first one has to be New Zealand located store photowarehouse, who has listed it here (thanks Massimo for letting me know via the revived contact form)

Details for Sigma 18-50mm F/2.8 DC DN Contemporary Lens For Fuji X-Mount

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Sigma CEO Confirms Sigma 18-50mmF2.8 for Fujifilm X mount Coming End of 2022 (Probably December)

It’s a known fact since February 2022 that Sigma plans to release the Sigma 18-50mmF2.8 DC DN Contemporary for Fujifilm X mount within this year.

And FujiRumors already reported how Sigma USA gave a more precise timeline: the Sigma 18-50mm f/2.8 for X mount will be released in December.

But all those statements were made back in early 2022.

So has something changed? Did the parts shortage or the price increase on those parts due to inflation change the plans at Sigma and possibly even delayed the lens?

Well, I am happy to report that Sigma is still on track to release the Sigma 18-50mm f/2.8 for X mount within this year.

This has in fact just been confirmed by the Sigma CEO himself, who in the latest Sigma Stage talk video confirmed that the lens is scheduled for “end of 2022 release“.

A little good news for X shooters.

Now let’s hope that they will also keep it gently priced as the Sony E mount version.

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