Update (thanks to the reader who posted in the comments, I got confirmation also from other sources): It appears as if the service Sigma is touting will be a mount conversion service. That is, Sigma will change the mount type of your Sigma lens so you can use it on a different camera brand (if you switch from Nikon to Canon, for instance). You will have to send in the lens (at least in the first period). It is yet to see if the service will be free or not.
Change your mind? Change your [mount]?
The Korean text translates to From September 2nd, Sigma will start the world’s first special… service. So, what is Sigma going to announce on August 1st? I suppose a new mount type adapter. That could fit the rumor I reported yesterday, that Sigma could launch a sort of universal system adapter where all Sigma lenses can be used on all mirrorless systems. We’ll see soon, the announcement is expected for August 1st 6:00am Korean time. Stay tuned! [slrclub via dicahub]
There is also another rumor concerning Sigma, though I do not think it is related to the announcement above. Rumors suggest that Sigma is working on a 24-70 f/2 OS HSM lens for full-frame cameras, and that lens should be faster than f/2.8. Thus a lens that is in line with the amazing 18-35mm f/1.8 DC HSM for APS-C cameras. No word about the price, the lens should be announced at Photokina 2014. [via CR]