Black Background for spinning ring video

[obonn3]

Hey I’m new to this site, but I’m looking for some help with making a spinning ring video. My boss wants me to make a video like this one:

https://www.leonmege.com/portfolio/custom-work/pink-sapphire-montpassier-ring-detail

I have a ring spinner so that’s not the issue, and I also have a lighting box set up, but having the black background is something I can’t figure out. I’ve looked at tutorial videos on YouTube and they instruct me to set the ISO to 100 and have a low f-stop on my DSLR so that the background looks black. Maybe my camera isn’t as advanced, but is there something else specific I need to do? Do I just need to get some black surfaces to put all around the ring?

I hope someone can answer this question, because I really need to know how to do this as soon as possible. Thank you!

Olivia

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