Sand into the Sigmonster (update)
I have send the lens to clean three weeks ago, and the service (in Spain) told me that the best solution of clean is send to Sigma Japan, they has told me that the lens will come totally clean, because the high clean conditions of the manufacturer, (pride for this every day) the total cost (for now) is 20euro to made the wood box to send the lens safe, 150euro to assure the lens, and 700euro to send to japan, clean and come to me. Total: 870euro from a small distract on the beach: the lens tilting and fall into the sand (without the rear cap), ouchh.
The lens will come to me at mid of octouber, 45 days from send to japan, (at least the service told me this) i am soo nervous because the lens is totally new, without any scrap, and the sigma lens is easy to scrap. When the lens arrives, i will post here the final result of this hard story.
Sorry for my low level english.