How Do you create your GIFs?
When it was rotating you could clearly see the sword reflecting light as it went round, could solve the photograph problem!
Also what type or rotating display do you have?
The GIFs are generated in After Effects, but there's plenty of online converters that will do the same thing - only difference being that the online versions often put caps on length and resolution. My process is shooting a video with a DSLR (I use my Canon 5DM2 with a 100mm Macro) on the turntable - which to answer your question is a jewelry store display case kind which I got for $2 at the local Sears going out of business sale, definitely made in China and super wonky. Once I bring the video into Adobe After Effects, do a couple adjustments to balance the color, I export it as a 1920x1080 H264 (.mp4), then create a downrez'd GIF with Adobe Media Encoder, it has presets just for GIFs.
I'm using the latest and greatest from Adobe Creative Cloud 2017 as my office uses that stuff extensively, but this whole workflow is the same going back to CS6 so you don't need anything fancy to do this. The same could even be accomplished with freeware like FFMPEG and using an online converter. Practically the same result, but I'm a perfectionist and some online GIF generators are laden with spy & malware (streaming video with a side of botnet, yes please!), so pick your poison. And GIFs are poison, once you make one you can help yourself but make more.
I shot some stuff last night and will be posting some more this weekend.