Question: Can something being transmitted inside a room affect EOS cameras?
Last Saturday while shooting a wedding I had a 5D and an EOS R seemingly record perfectly.
When I got home only the clips that were shot inside the church were corrupt files.
Electronic devices generate and are also subject to interference generated by other devices. It is quite possible that there is an electronic device in the church that is generated enough RF (radio frequency) garbage that it is causing other electronics to have issues but if so it is an extremely strong field.
In the U.S., the FCC (Federal Communications Commission) is the primary regulatory body HOWEVER enforcement is extremely weak and many devices are imported which in no way come close to complying with Part 15 of the FCC standards: https://www.fcc.gov/oet/ea/rfdevice
Other than RF interference to your camera, I can't think of anything in the church that would cause a camera glitch of this type. To be clear, although your camera isn't a radio-like most modern electronics it is a combination of analog and digital electronics with components operating at very high switching/processing rates and these actions both generate RF energy and make the device subject to interference from other RF energy.
Hey thanks so much, I appreciate your thoughts and that's what I was wondering.
I'll contact the church and see if I can talk with their technical director because this could happen again to another person.
You are welcome!
I think RF interference and demonic possession are the only two possibilities and I am betting on the former 🙂
You know, now that mention it, there was a temporary table setup right behind where I was filming. On it was a flight case with monitors and camera switching equipment for live-streaming. I wonder if that's what caused my issues. I'm going to reach out to them to see what all they had going on Saturday so I can avoid it next time. Thanks again!
Did that setup have a tall pole with an antenna on top that looked like this?
Maybe you walked in front of the line of path between the wireless mic and the active microphone directional antenna.
RF is electromagnetic radiation (as are light waves) but I think you are probably thinking about the impact from strong non-cyclical or slowly cycling magnetic fields such as those caused by rare earth magnets, speakers, and power transformers as a few common examples.
These can cause electronic "glitches" but RF generated interference is a far more common cause than very strong magnetic fields which are quite uncommon at the level necessary to cause electronic devices to malfunction.
Hey John, yeah, that's a good thought.
I was filming video on my EOS systems (5DmkIV and EOS R) but there were two photographers there shooting photos on their 5D's. Since photos are quick and write a small file to their cards, they said their photos are all fine.
So I'm going to contact the church and see if I can go test my camera again there - same camera, same card, and try to record a 21 minute clip from the same spot I was standing.
I did record a 21 minute clip at home on the same camera/card since this happened and everything works perfectly.