So we will see a bunch of cameras and lenses in 2018. Now a new rumor recently surfaced over the web that partially informed that in the beginning of 2018 Sigma may come with two new lenses: One will be 70-200mm f/2.8 DG OS Art series lens, and the other a 70-200mm f/4 DG OS contemporary lens.
The 70-200mm f/2.8 DG OS Art series lens has been in the rumor for long time, but the 70-200mm f/4 DG OS contemporary lens recently joined the rumor line. According to the rumor, both of these two lenses have chance to be unveiled at CP+ show in February.
However, the rumor mills says to take the rumor lightly.