[thxbb12]

Given Canon and Nikon's market share I'd say they are probably the most represented.

These are "classics" lenses (the 24-70 should probably go here too):
- Canon EF 70-200mm f/2.8 USM L IS II
- Nikkor AF-S 70-200mm f/2.8 G ED VR II

I still think that APS-C represents the majority of viewers, so I'd say:
- Canon EF-S 17-55mm f/2,8 USM IS
- Nikkor AF-S DX 17-55mm f/2.8 G IF-ED

One of the few f1.2 lenses so it's probably been attracting quite a bit of curiosity:
- Canon EF 50mm f/1.2 USM L

This one is also a classic for landscapes:
- Canon EF 17-40mm f/4 USM L

And finally, because I still have a little something for Pentax and these two have been touted (back then) by some to be among the greatest lenses:
- Pentax SMC FA 31mm f/1.8 AL Limited
- Pentax SMC-FA 77mm f/1.8 Limited

One question: for the same lens, do you cumulate the number of views from different bodies/formats or not? (i.e. say a 70-200 was tested on a 10MP APS-C body, then 15MP APS-C body and finally a 20MP FF body: do you add the number of views of the 3 tests or not?)