This post is going to be a wild mashup of things, all of which I’m pretty excited over.
The fangled contraption below is something film geeks will recognize as a “slider.” Not a slider in the White Castle sense, but a smooth rail that moves a video camera from one point to another.
As it is shown above, the slider is equipped for video use. I’ve built a set of legs attached to ball-head tripod mounts which allow it to be positioned in a wide variety of configurations. There is also a shoulder mount, and an extra grip for one-handed wrangling. This is essentially a customized version of the DIY slider described at ZaZaSlider.com, meant to be an improved version of the Glidetrack Shooter slider. Any filmmakers who feel inspired by these shots, you can create the same thing yourself by reading up at the ZaZa website and ponying up maybe $250-350.
For anyone who’s curious, I’d comment that this thing is somewhat impractical for shoulder-mounted use. Yes, it works; the hand grips are comfy and the shoulder padding keeps it from getting fatiguing. Yet… it’s just heavy and big. Even made of lightweight aluminum, a one meter slider is a lot of bulk to double as a shoulder rig, and on the flip side of that coin, anything smaller than a meter is getting into the territory where it’s not enough length to get a decent looking slide. So can you have it both ways, a slider AND a shoulder rig? Eh, sort of.
Shoulder rig ho-humming aside, the slider does work great. The following video shows it in action at Bear Creek, which was the first time I put it to considerable use. The video also shows a good amount of Steadicam footage, shot on a Steadicam Merlin which I rented for the fest. It was a terrific amount of (photo-dweeb) fun to use these both!
These shots are a compilation of cool videography from the festival grounds and miscellaneous shots that wouldn’t logically fit into any of the New Mastersounds or Lettuce videos I posted before. I still have more stuff to sort through… I haven’t even posted the Soulive yet!
I learned quite a bit in doing these videos. Number one lesson was slide SLOW. It’s best to push the slider from its base, and keep hands off the camera itself. Wind can also jostle the camera around. A tougher ball head on the carriage itself may address that issue. Right now I have a pistol-grip Sunpack head on it, which certainly isn’t the paragon of build quality. As for the Steadicam, I was surprised to find that the Merlin was not nearly as well constructed as I expected it ought to be. For $800, I assumed it would be a piece of finely-crafted, impeccably-machined precision. It was not. Given, I was using a rental unit, which probably had been subjected to rough ‘n’ tumble treatment, but still, the joints had wiggle, the bottom counterweight could be bumped or moved in and out, easily throwing off the balance, and worst of all, the quick release plate only loosely held onto the steadicam itself. In the wrong situation, I could see a camera getting dropped by that quick release. Yikes.
I also learned that 30fps is NOT fast enough for quick pans or fast steadicam moves. I defintitely regret not shooting in 720p/60fps, as some shots were blurry messes at 1080p/30fps. I believe it is due not to the framerate itself, but more to the fact that each frame of your movie is actually an exposure of 1/30th of a second when you have low/medium light and video autoexposure is enabled (you could shoot manual but that’s a lot of monitoring and adjusting, when you could be thinking about framing instead). 1/30th of a second is not really fast enough to prevent camera blur, even at wide angle. If you had very bright light, you could might get away with 30fps modes as the autoexposure would be forced into a faster shutter. This is something I need to remember, moving forward as a videographer.
It was super fun to use the Merlin, and it did pop out some mondo-sweet footage. When it works, it SINGS. But after seeing this thing up close and in action, I don’t think there’s any way I’d pay more than the price of my SLR for one. Maybe in 2012 there might be a DIY Steadicam build. But that’s looking far ahead. I digress. Back to the slider:
In addition to duty as a hand-powered video slider, I’m also planning something very ambitious for it. There’s a section on OpenMoCo.org (short for open source motion control systems) called “Project Chronos”. It adds a stepper motor’s super slow motion capability to the slider so that you can do timelapse while your camera moves, like they do in all those super sexy timelapse videos–only for a fraction of the price compared to commercial systems that do the same thing! When I saw this existed, I knew I HAD to build it. This is going to require a lot of soldering, troubleshooting, emailing, and above all, patience. I’ll do some periodic updates on the progress as I go along.
For the boldest and most tenacious of readers who may be interested in attempting their own Project Chronos, mastermind Chris Field has pictures, videos, circuit diagrams, Arduino code, and finished product samples all online for your consideration. I have also began a build thread of my progress over at Timescapes.org for anyone who wants to read the gory details. At the moment I have built two PCBs as pictured below. The blue one is actually a kit with very comprehensive assembly instructions online which made its construction relatively simple. The green PCB is the Chrono-specific circuitry and still a work in progress. More posts on this as it develops.
Also, soldering shit in my free time makes me feel like a badass. Maybe it’s the smoke, or maybe it’s the hardcore nature of building your own circuits. Busting out my resistor collection and putting it back to use felt really good. I said to my girl; oh yeah, these resistors aren’t just going to sit inside a box forever, these have got a cooler destiny… ultra-sweet timelapse!
Bring on 2012!
