Sigma Crowned Over Canon in the Best-Selling Lens Race

When it comes to buying a lens today, there are a plethora of options--from Japanese third-party makers to Korean and Chinese manufacturers--one could say that photographers are spoiled for choice. Each lens manufacturer knows they are competing with the precision and finesse for first-party creators, and so, not only they they need to come close to that performance, but also undercut them through price. Sigma and Tamron have been doing that for a while, and it appears, these third-party manufac...