Sensei Cap Keeper Lens Cap Holder

The loops part on the Sensei Cap Keeper Lens Cap Holder can be adjusted to fit most lenses. It will fit lenses with narrow diameters.

Yes, the Sensei Cap Keeper Lens Cap Holder, BH #SECK, can fit the FUJIFILM X-E5 Mirrorless Camera with XF 23mm f/2.8 Lens.

Nearly every lens cap that has a flat surface for the adhesive to attach, which is to say, most of them. I purchased this for my Olympus OMD e-5 and it does just what I need it to do: keeps me from losing the lens cap :-) You'll need to keep an eye on the black elastic; over time it stretches out, but this can be fixed with a stitch or 2 to adjust it to the size of the lens you're using.

BH only sold it in black when I purchased mine.

This was actually answered by another customer if you check the reviews: I've been buying these for forty years. I was surprised to find 2 grades of Sensei Cap Keepers listed at B&H. I went for broke and ordered both. Cap Keeper Plus uses a heavier grade of elastic, a heavier cable, and it has a neat, plastic connector where cable and elastic join. The plebian grade joins eleastic to cablewith a metal staple, just as secure, no rough edges, but a bit raw. Also, the Plus version has a smaller S on the button that affixes it to the lens cap.As to effectiveness, in 40 years I've never had one that stayed stuck with the supplied adhesive. After the first lost lens cap, good epoxy holds it tight.CONCLUSION: Plus costs $1 more. I don't think it works any better, but if you're fussy about such stuff, perhaps it's worth the $1. For me, having satisfied my curiosity, I'll save future bucks.