By far the best price I have seen on the Sigma and easily the best wide angle lens for APSC cameras you can get for the price. Found out I am out of touch with the Canon world and there is a great new Canon 10-18mm, which is probably better.
http://www.bhphotovideo.com/c/product/381610-REG/Sigma_20110…
The Pentax lens is an even more epic deal: http://www.bhphotovideo.com/c/product/1089881-REG/pentax_213…
The Pentax 16-85mm came out last year and has got rave reviews. It is a weather sealed lens, so ideally it should be combined with a weather sealed Pentax body - K-5, K-3, K30, K50, K-S2 etc.
Please avoid discussions about the merits of DSLRs vs mirrorless, the merits of Canon vs Nikon vs Pentax in this deal if possible.
If you don't already have a Pentax or Canon DSLR body, this deal isn't for you.
Free DHL express shipping. Pay with 28 degreess or Citibank or similar in USD to avoid currency conversion charges.
The Canon 10-18mm IS lens is $324.00 delivered from Camera sky and about $390 at walk in shops, to me thats a better lens if you have a Canon camera.