Ma question au vendeur:
> I've heard international guarantee only works in the continent where the
> lens was bought. I wonder if your item is imported from asia with
> international guarantee from there or if it's really from UK with
> guarantee from UK. It's just because the prce is so low, it looks like
> items from HK, with a lot of side problems (no guarantee, duty tax at
> the boarderline, etc...).

et leur réponse:

>Hi, this item is imported from Japan, but since we'll ship it to you from UK, so you don't >need to pay any custom tax for your purchase. It's under Sigma's international warranty, >so you can get it repaired in your local Sigma service, thank you.

En gros, si on achete chez ce vendeur, pas de mauvaise surprise de taxe ou de douane, mais, garantie inoperante...ou litigieuse.