Amazon.com offers Tamron A011 SP 150-600mm F/5-6.3 Di VC USD Zoom Lens for Canon, Nikon, and Sony mounts at the price of US$1069. + 7% GST
Due to highly demand, currently the lens is globally on back order. But comparing to Singapore price, BargainQueen believe it is a good deal.
Amazon only charge your card when the item ships out.