Tamron has announced instant rebates on several lenses including the SP 150-600 G2 (generation 2) ultra-telephoto zoom. The rebates are available through December 30, 2017. The lens builds upon the original SP 150-600mm (Model A011) which Tamron first introduced in December, 2013, including better overall optical performance and faster AF speed, VC enhancements, plus Fluorine Coating, FLEX ZOOM LOCK and teleconverter. Several additional Tamron lenses are available with rebates during this time. See the Resources page for purchasing information.