These are compatible with the Moment case however they do fit extra snug. So tight that it does seem to have scraped the mounting on the case but I don't think it'll get any worse.
With the new case I decided to order the 18mm version 2:
Nice it came with a case but it's laughably huge compared to my Moment case. I think it's because it a repurposed 3 lens kit case. The red lens is the original version 1. Rubber caps for the front and back are a nice touch.
Here's the unboxing pics:
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