Shooting a model and handheld I’d consider them in this order;
Canon EF 16-35mm f/2.8L II USM
Canon EF 24-70mm f/2.8L USM
Seeing as it’s handheld you may want to go extreme wide, this lens also gives some dramatic perspective.
Tokina AT-X116PRDXN AT-X PRO DX 11-16mm f/2.8
The Tokina is the fastest f stop zoom in this class but will not fit a larger sensor such as on the 5D.
A full set of Canon lenses would include this lens also;
Canon EF 70-200mm f/2.8L IS II (expensive)
You should also consider a variable ND filter which will allow you to maintain a constant wide aperture setting outdoors. If you choose the 16-35 you’ll need and 82mm fit. Purchase a 77-82mm step up ring so you can fit it to the 24-70 as well.
If you are mainly shooting video you won’t notice much or any apparent resolution difference between genuine Canon lenses and good quality other brands. The cameras sensors do too much line / pixel shedding in video mode to make this a critical factor. If you also do stills though the quality difference will be noticeable.
Buying quality lenses is well worth the money, they will out live your camera body by many generations.
Cinematographer, Steadicam Operator, Final Cut Pro Post Production.
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