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Re: Flickering in welding footage

COW Forums : DSLR Video

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John Baumchen
Re: Flickering in welding footage
on Mar 24, 2015 at 2:28:02 pm

the arc of the welder is a noise generator that is affecting your camera's electronics. These generate HUGE amounts of EMI/RFI (electromagnetic interference/ radio frequency interference), close to the arc.

What is likely happening is that these EMI/RFI waves are passing thru the housing of your camera, hitting the copper traces on the printed wiring boards, (which act like antennas), and the EMI/RFI induces unwanted electrical currents into the camera circuitry, causing the noise problem you're encountering.

One way to help reduce it is to move the camera farther away from the source, or get some phosphor-bronze mesh, wrap it around as much of the camera housing as possible, and ground it. This creates something of a Faraday Cage, (an RF shield), that should allow you to place the camera closer to the welding.


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