It only took two years of the cable coming loose from the left side port of my 5D2 and 7D, just when I had the perfect shot. The shutter would not fire as a result. I had bought a couple of cables from HK in the past, all had the same problem. I've heard that the Canon cable has the same issue.
I posted about it a week ago and a couple guys said, 'yeah, these are all bad cables, doesn't matter whether it's a Canon or a Chinese knockoff, and they're probably made in the same factory '. I was very frustrated, but based on good reviews on B&H, I took a chance and bought a couple of the Vello releases
there.
They are perfect. They fit so tight, you have to give them a little pull to release them. The reason is in the photo below.
The length of the male connectors to the camera pins, the first part of the connector seen facing one another, looks a little longer on the loose cable on the left, compared to the Vello cable on the right.
However, the difference is because of the length of the collar of the connector which holds it in the port. On the left with the red arrow, you'll notice it's only about a 16th of an inch wide on the bad cable. On the Vello with the blue arrow, it's about a quarter inch. That extra length holds it tight. The actual pin connector is also a bit longer on the Vello, to accomodate the wider collar.
$7.50 at B&H. The Canon is about $40.
Also will post this on the "coolest accessories" thread.
Photo below courtesy B&H
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Anyway, my cable release eventually broke last night -- there's a break in the wire on the thicker grooved rubber area that connects outside the handset. Press the shutter release, nothing - but if I wiggle the wire at that section then it triggers the shutter. Problem repeats consistently. I removed the two screws to open and see if possibly the wires came loose internally but that wasn't the case.
