http://www.pentax.jp/japan/products/lens/index35_morezoom.html
(in Japanese)
Btw, the file name of the high resolution product image which is linked in the above page is "t-da18-270mm_F35-63ed_sdm.jpg". So, what does the "t" letter mean and represent? Tamron?!
After all, RP is just so honest! Do they really need to tell this again even though all people already knew! >:-o
As for the price, whilst it is said to be "opened". I guess this lens will not be cheap, with reference to the price of the original Tamron version that is already on sales in the market for quite some time now.