I recently posted the TDP Canon Lens Popularity Rank.
A friend of the site expressed interest in seeing the 3rd party lenses included in this list and ... that sounded interesting to me also.
So, today I share the extended list.
Once again, I caution you to use discernment as you view the list.
There are a lot of factors that can influence a lens' popularity (such as search engine referrals) and popularity can be measured in a variety of ways.
Also, not all Canon-mount 3rd party lenses are included on the site and of those listed, not all have full reviews (which could either hurt or help a lens' popularity).
With those cautions in mind, here is a rough look at the popularity of current (on retailer shelves) Canon-mount lenses.