We needed Lenses.
The salesman who sold us on the Canon 5d Mark III specifically told us that we would be able to use the canon lenses that we already had. He didn't mention that the higher end cameras use an EF mount, not the F mount lenses we already had. You can chalk it up to a bad salesman or you can chalk it up to a learning experience for us, either way we were suddenly in a bad way and needed lenses.
We were pretty unhappy until Dave found an incredible deal on Amazon and managed to pull two lenses for the price of one. We had been looking at renting lenses from a couple different places, and this deal let us drop the change we had originally been planning on spending on rentals to purchase our own. These are the two lenses we finally decided upon.
Wide Angle (CANON 17x40 - 1:4)
The wide angle lens we got isn't what I would call a crazy wide angle, and it is the lens that I would recommend to most people having to choose just one. I'm a big proponent of the "just shoot it" method of becoming a filmmaker, and if you've got to have one lens so you can shoot, make it a medium and just change the position of the camera. This lens provides a great depth of field, has an automatic exposure on/off button, and easy to use focus rings. The focus rings on this lens are super smooth and, after the shoot, have been making me think about focus pulling hardware.
Long (CANON 70x200 - 1:28)
This long lens is freaking great for indoor work, or even if you're just trying to get a shot of the guys across the lake. It's not for ECU's through a car or anything, but as a general purpose long lens, this bad boy really hits the nail on the head. At its widest, it holds a really crisp picture, and when focusing in, it warps the background in a beautiful octagonal pattern. Octagonal might be the wrong way to talk about it, as there are no seams as the image warps, but it's what jumped to mind. I had a really great time using this lens, and when looking at its cost on Canon's page, I can't believe we got such a great deal on it. It just goes to show you that spending a little extra time looking around can really help you when you're trying to get the most bang for your buck.
Both these lenses worked out great for us, and I ended up extremely happy with the results from our shoot. In researching what kind of gear to purchase, I heard a lot of talk about substandard aftermarket lenses and other manufacturers making specialized lenses and etc... There is certainly no small amount of people willing to weigh in on the subject. My thinking, after talking with the director, was that for the crispest image possible we should go with the camera manufacturer's lenses. I was so committed to this idea (because crisp images were really important to Dave) that I was willing to just use one lens for the shoot. We lucked out, plain and simple. If we hadn't had the opportunity to pick up two lenses for the cost of one, I think I would have opted for renting rather than take a chance on a different manufacturer. If the director had wanted a soft look, or if it wasn't that important to him, I might have opted to take the chance, but that's how production decisions are made. I am nothing but happy with the way it's played out so far.