According to Sigma Youtube channel, Sigma will announce a new E-mount lens for Sony mirrorless cameras on February 9th, at 21:00 JST time.
Sigma Rumors
Sigma 20mm f/2 DG DN | Contemporary Lens to be Announced Soon !
Nokishita has just confirmed that Sigma will soon announce a new full frame E-mount lens soon. This lens is Sigma f/2 DG DN | Contemporary lens, below are specs of this lens:
Sigma 18-50mm f/2.8 DC DN Contemporary Lens to be Announced Next !
Nokishita confirmed that next Sigma lens for Sony E-mount will be Sigma 18-50mm f/2. DC DN Contemporary lens. This lens will be an APS-C E-mount lens, for Sony APS-C mirrorless cameras. Stay tuned for more info.
Sigma 90mm f/2.8 & 24mm f/2 DG DN Contemporary Lenses to be Announced on September 9th
The upcoming Sigma 90mm f/2.8 DG DN Contemporary lens and 24mm f/2 DG DN Contemporary lens will be officially announced on September 9th at 8 am ET. Below are specs of these two new lenses:
Sigma 90mm f/2.8 & 24mm f/2 DG DN Contemporary Lenses to be Announced Next
According to Nokishita, Sigma will soon announce two new full frame prime lenses for Sony E-mount and L-mount. These two new lenses are Sigma 90mm f/2.8 DG DN Contemporary Lens and Sigma 24mm f/2 DG DN Contemporary Lens.
Sigma 150-600mm f/5-6.3 DG DN OS Sports Lens for Sony E-mount to be Announced Soon

According to Nokishita, next lens for Sigma will be Sigma 150-600mm f/5-6.3 DG DN OS Sports lens for Sony E-mount and L-mount. The US price for this lens will be a bit higher than Tamron 150-500mm f/5-6.7 Di III VXD lens ($1,399). Below is the specs of this lens:
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US Price for Sigma 35mm f/1.4 DG DN Art Lens will be $899

Sigma will soon announce the 35mm f/1.4 DG DN Art lens for Sony E-mount. According to Nokishita, the US price for this lens will be $899. Stay tuned for more info.
Sigma to Announce a New DN Series Mirrorless Lens for E-mount & L-mount !
Sigma will announce a new DN series mirrorless lens for Sony E-mount and L-mount. The official announcement is on December 1st, at JST 21:00 / CET 13:00 / EST 07:00. Stay tuned for more info.
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Sigma 200mm f/2 FE Lens Rumored Coming in 2021
Back in 2016, Sigma Japan has filed a lens patent for the Sigma 200mm f/2 DG OS Sports lens. Now according to latest rumors, this Sigma 200mm f/2 lens patent could be for Sony E-mount. The new Sigma 200mm f/2 DG DN OS Sports lens for Sony E-mount may coming in 2021. Stay tuned for more info.
Sigma 105mm f/2.8 DG DN Macro Art Lens Leaked Images & Specs
Nokishita has just leaked the first images and specs of upcoming Sigma 105mm f/2.8 DG DN Macro Art lens. This lens will be officially announced in next few days. US price will be $799.