We have told Sigma will announced another full frame lens sometime in 2013. This rumored lens is Sigma 24-105mm f/4 DG OS HSM lens(Not sure if has optical image stabilizer).
Sigma is rumored to release some super telephoto prime lenses in the 2014. According to CR, Sigma is working on big prime lenses as below:
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As rumored before, Sigma will launch two new lens 135mm f/1.8 and 24mm f/1.4 in late 2013. Now recent rumors from CR said that the Sigma 24mm f/1.4 DG HSM art len is almost ready, and could be announced in late 2013 to early 2014.
As previous rumors shows that Sigma will announced a new revolution system on August 1. Now the detail leaked: Sigma will offer free mount conversion services for any of your Sigma lenses. You can use this free services to change your current Sigma lens mount to any other available mount for free.
Sigma is rumored to working on a lens called Sigma 24-70mm f/2 DG OS HSM for full frame cameras. This would be world’s first 24-70mm standard zoom lens offers f/2, faster than Canon & Nikon & Sony 24-70mm f/2.8.
A leaked image and specs of Sigma 18-35mm f/1.8 DC HSM lens for APS-C DSLRs shows up on The Czech website Digiarena. This rumored Sigma f/1.8 zoom lens seems a great news for APS-C based DSLRs.
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