I now am of the camp that HDSLR (Canon, particularly) cameras are among the best options for guerilla and low-profile filmmaking - as long as you know how to focus and expose manually (those out there who are used auto focus, exposure and other auto features as a crutch should stay away). Here's why:
- In "guerilla" or run and gun filmmaking we often don't have time or permission to light. The DSLR cams have the ability to shoot at a very high ISO (sensitivity). And they're so good that the digital noise typically associated with doing this (raising your gain on a conventional video camera) is often hardly noticeable, and rarely distracting.
- Shallow depth of field. Now this is where I really sound like I'm flip-flopping. I used to be of the opinion that the shallow DoF was a pain for doc shooting... don't get me wrong, it does make things difficult for those out there who are used to letting the auto focus work. However, I discovered on a recent shoot that the shallow DoF actually made things easier for a run 'n gun shoot I was on. I was shooting footage on a nighttime police ride-along (awesome, yes, I know) and much of the interview was done while the officer was on duty, patrolling in the squad-car. I used the shallow DoF (especially shallow because I needed to be wide open for exposure) to let the world outside of the vehicle get milky. It let lights and signs blend together for this beautifully milky wash of moving, breathing color in the background. It really made for a beautiful shot in a pinch.
- They're SMALL. DSLR cameras are tiny and they look like still cameras. Ok, fine, they are still cameras. In the first bullet point, I mentioned lack of permission regarding lighting. While most of my projects, big and small, are on the up and up as far as permits and permissions go, there's a good 10% that are done on the DL. On those few projects, there are always any number of valid reasons for going that way, but we're not here to discuss those sorts of things. Whether you're not supposed to be filming or you've been asked to be inconspicuous, the small form factor of DSLR cameras lets you be just that. It's not a whole lot more than you just standing there. In addition to avoiding attention, it also lets you shoot differently than you would with a larger camera. You can essentially shoot anywhere your body fits - while a large-format camera ads considerable depth to your figure, so you're limited.
As I've said in previous posts, I'm not an advocate of any do-all camera or format, but the current crop of DSLR cameras, in particular, are certainly establishing a solid footing in professional video production.