Sena wants you to have an action cam. How? By creating a low-priced entry into the action camera market in the form of the Sena Prism Tube. For just $119, you get a 1.0-inch diameter by 3.9-inch length aluminum cylinder capable of capturing about two hours of 1080p 30fps video and audio. Once mounted to the rider’s helmet via the included mounting system, operating the unit couldn’t be any easier. Simply sliding the ring around the outside of the tube forward turns the Prism Tube on and begins recording. It’s that simple.
But we’re getting ahead of ourselves here. Let’s take a look at the unit itself.
The shape of the Prism Tube combines with the helmet mount to make it easy to set the camera angle. The LED on top conveys charging and recording status. (Flashing blue means recording.)
The design is compact and clever. One of the biggest issues with mounting an action cam on a motorcycle helmet is getting the orientation of the camera correct. Sena simplifies this by making the mounting bracket responsible for the up/down orientation while the camera rotates to level the horizon. A red-colored raised portion of the on/off switch indicates which way is up. However, this ease of adjustment is also the Tube’s biggest weakness. It is far too easy to accidentally rotate the Tube in its mount while turning it on or off. The good news is that a well-placed piece of tape easily negates the issue.