Sigma Patent P2026079898: The Ultimate Prime Trio Unveiled – 85mm F1.2, 105mm F1.4, and 135mm F1.4

A newly published patent (P2026079898) reveals that Sigma is actively developing optical formulas for what could be the ultimate portrait prime trio for full-frame mirrorless systems. The patent outlines specifications for three incredibly fast telephoto lenses: an 85mm F1.2, a 105mm F1.4, and a 135mm F1.4.

This signals that Sigma is pushing the boundaries of light-gathering and depth-of-field control, aiming to produce some of the most dramatic bokeh rendering we’ve seen on the Sony E-mount.

Key Technical Specifications

Our research into the patent documentation highlights several critical optical characteristics for these new designs:

• Format Compatibility: The optical designs are engineered for Full-Frame sensors but maintain full APS-C compatibility.
• Back Focal Length: The formulas demonstrate a back focal length ranging from approximately 13mm to 17mm, which is perfectly optimized for the short flange distance of modern mirrorless mounts.
• Image Height: Designed to cover an image height of approximately 14.2mm to 21.6mm, ensuring edge-to-edge coverage on full-frame sensors.

What This Means for Sony Shooters

Sigma has already established itself as the “Bokeh Master” with the current 105mm F1.4 Art, but moving the 85mm to an F1.2 and the 135mm to an F1.4 takes things to an entirely new level.

• The 85mm F1.2 would directly challenge Sony’s top-tier GM offerings, providing that ultra-shallow depth of field portrait shooters crave.
• The 105mm F1.4 continues to occupy that sweet middle spot of the portrait trio between the 135mm and 85mm. This new patent appears to be a mirrorless-optimized evolution of their legendary DSLR design, likely aiming for better autofocus performance and a refined optical path.
• The 135mm F1.4 is perhaps the most exciting prospect, taking the already phenomenal background compression of the 135mm focal length and combining it with an F1.4 aperture.

While patent filings do not always guarantee an immediate product release, the specificity of these optical formulas suggests these designs are well into the research and development phase.

In the meantime, if you are looking to upgrade your current portrait kit, you can check out current pricing and availability for Sigma’s existing Art line below:

• Sigma 85mm f/1.4 DG DN Art Lens for Sony E
• Sigma 105mm f/1.4 DG HSM Art Lens for Sony E
• Sigma 135mm f/1.8 DG HSM Art Lens for Sony E

Sigma lenses can be found at B&H Photo and Amazon.

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via j-platpat