see also:

• astrophotographic landscapes of the Milky Way
• Nikon AF-S 14-24mm f/2.8G
• Canon EF 16-35mm pro lenses

• high quality wide angle zoom lens for full frame dSLR cameras
• announced in 2014

• 15-30mm field of view
• 18 elements in 13 groups, including 3 LD elements as well a 3 molded glass elements (includes a 'XGM' element ('eXpanded Glass Molded Aspherical') )
• plastic with metal mount
• optical image stabiliser (hence the Vibration Control VC terminology)
• 9 blades
• close focus 0.28m
• anti-dust/water-repellent coating on front element
• moisture-resistant construction
• no filter thread
• 98.4x145mm
• 1.1kg

• http://www.photozone.de/nikon_ff/989-tamron153028vcff
  • 3.4% barrel distortion at 15mm, almost nil at 21mm then 1.2% pincushion by 30mm
  • 1.5EV vignetting at 15mm reducing to 0.9EV at 30mm
  • softish edges and corners wide open
  • sharpest at f/5.6, similar to the Nikon AF-S 14-24mm f/2.8G
  • well controlled lat CA avg 1px
  • better flare control than the Nikon AF-S 14-24mm f/2.8G
• http://www.imaging-resource.com/lenses/tamron/15-30mm-f2.8-di-vc-usd-sp-model-a012/review/