Today ThatNikonGuy (Matt Granger) throws these three flagship lenses against each other in battle. In this series Matt goes through a whole range of head to head tests, to really put these lenses through their paces.
Part 1 includes focus speed, hand holding (image stabilization) and lens flare tests.
Sigma 70-200mm - http://www.sigmaphoto.com/shop/apo-70-200mm-f28-ex-dg-os-hsm-sigma
Tamron 70-200mm - http://www.tamron.com.au/di70-200_a001.html
Nikon 70-200mm - http://www.nikonusa.com/Nikon-Products/Product/Camera-Lenses/2139/AF-S-VR-Zoo...
Kata UL 222 - http://www.kata-bags.com/productFRM2HS.asp?p_Id=19780&;Version=Photo
Velbon VS 443 - http://www.velbon.co.uk/products/photo/photo.html
Filmed on D5100.