Tamron has officially announced the new SP 15-30mm f/2.8 Di VC USD G2 lens today. The US price for this lens is $1,299, now available for pre-order at B&H Photo Video/Adorama. Release date for Canon EF mount is in October, 2018. This new lens has new elements and coatings, a more powerful autofocus CPU and an enhanced Vibration Correction system.
Tamron will soon announce an updated version of SP 15-30mm f/2.8 lens: Tamron SP 15-30mm f/2.8 Di VC USD G2 Lens. Expect officially announcement will be before Photokina 2018 in late September. Above is the first leaked image of this lens.