Having said that, the design age of the 50/1.8 II and 50/1.4 certainly don't seem to bother the buyers on Amazon.com, where the Canon 50/1.8 II is the #1 selling lens and the Canon 50/1.4 is the #3 selling lens. You need to go to #36 on their Top 100 list to find the first Sigma lens, and the Sigma 35mm f/1.4 Art isn't on the list at all.
That list contains quite a few oddities which makes me wonder how accurate it is:
- The 24-105 L IS is listed twice, once at rank 13, then again at rank 25. Given that it comes as kit lens to many ff cameras, I wonder how many people buy it later on. In the used market it is sold at fire sale prices ...
- Even stranger is the high volume reported for the various 18-55 F/3.5-5.6 lenses. These usually come as kit lenses for crop cameras, why would anyone buy these separately?
- I see lots and lots of people running around with crop camera plus superzoom, yet these don't seem to show up in the higher ranks.
- The 16-35 shows up higher in rank than the 17-40. Sounds bogus if you ask me.
- The 70-200 F/4 showing up lower in rank compared to the 70-200 F/2.8 also strikes me as odd. All people I know with a 70-200 F/2.8 have the IS version, either Mk I or Mk II.
Obviously I don't have any insight into Amazon's sales numbers, and I don't run or work in a photo store to provide real world numbers, but I think Amazon's reported numbers raise more questions than they answer.