This is a review of the IDC 5Dmk3 Plate w/ Anti-twist & HDMI Lock. It’s a bit on the pricey side, but it takes care of two important things in DSLR video.
Let’s go into why you need anti-twist and HDMI lock. First anti-twist. When you attach your camera to a tripod or rig with a single 1/4 20 thread, you can usually tighten it down pretty well, especially if there is a bit of rubber between the two. However, once you attach a follow focus, it will create torque – pressing against the lens. This can nudge the camera and lens a bit when you pull focus. This IDC plate takes care of that by pressing a back bar up against the camera just below the screen as well as proving a tab to go into a small hole on the bottom of your camera. The trick then is to mount camera and anti-twist plate onto a tripod or rig using two 1/2 20 threads or the whole thing will twist.
Next the HDMI lock. HDMI is a bit of a flimsy plug. There is a great risk of yanking your HDMI cable out of your camera whilst shooting. This not only interrupts the signal to your field monitor / EVF / recording device, it can damage the pins inside your camerals HDMI plug. I’ve heard different quotes on how much it costs to send your damaged camera into Canon or Nikon to fix. Anywhere from $500 on up to $1000 for the repair. Not to mention the loss in revenue while you wait for your camera to return. So while this plate seems expensive for a chunk of metal, consider it insurance against HDMI port damage.
I like this IDC plate because it provides BOTH anti-twist and HDMI lock. I just don’t love the way you tighten the screws onto the cable. I’ve ordered a 2nd knob from them. I think once you can tighten in on the cable from both sides it will be a better solution.
I’m working on an article showcasing all of the HDMI lock solutions available on the market. This IDC plate will be among them.
So I got the extra thumb screw in the mail yesterday and here’s what it looks like installed. Having two thumb screws really makes this so much easier to properly secure your HDMI cable. Sure, there are a lot of HDMI cables out there, but for my cable from the Zacuto EVF flip, it works like a charm – tightening it firmly. I’m going to write IDC and see if I can convince them to ship their lock plate with two thumb screws. Note how the cable is going right through where the 4th swiss rod would be on the Kamerar Tank. Could be an issue if you use 4 rods, though it’s totally stable with only 3 rods.