Tamron is really throwing their name around with the new lineup of VC lenses. The above video is one of the tutorials found at the Tamron Youtube channel. I actually own the same lens shown in this video (if that's the 18-270mm), and have to admit it's one of my most favorite travel lenses. The VC I can vouch for, works awesome, and works well for video too. You won't get the super sharpness of a prime and the focus ring is a bit noisy and stiff, but Tamron is doing a great job with their pricing too. Check out the Tamron YouTube channel for other great DSLR tips.
I'm always networking and learning from professionals so that one day I might be able to step up my game. One of the guys I turn to for technical DSLR videography questions is Michael Sato at www.DSLRUniversity.com. Recently Michael announced that he'll be possibly holding a workshop closer to my area, and I thought i'd share this information.
If you are looking to make the transition from a video camera to a DSLR camera let Michael Sato from Satostudios give you a jumpstart on camera operation, Lenses, stabilization, and workflow. Learn how to use your Canon 7d,5d, 550d, 1dmkiv to fit your video needs. Whether you are a current film maker, photographer, or just starting out he will help you become an expert to fit your projects. Michael offers 1 day 4 or 6 hour workshops or a 2 day complete training.
For workshops and commissions go to: http://www.dslruniversity.com/education/satostudio