The best-selling lens in Japan

BCNranking reports the most sold lens from 2011/05/01to 2011/05/31.

See the list of the first four:
1. Canon EF50mm F1.8 II
2. Tamron AF18-270mm f/3.5-6.3 Di II VC PZD AF Lens for Canon
3. Nikon AF-S Nikkor 35mm f/1.8G DX Lens
4. Tamron AF18-200mm F/3.5-6.3 XR Di-II LD Aspherical [IF] Macro Lens for Canon