Olympus TG5/6 Accessory Help Please

I have both attachments on my TG-5.

I have the CLA-T01 adapter that I've had for some time. I would attach a 40.5 to 49mm step-up ring and a generic lens cap to provide protection for the lens when the camera is thrown into my luggage. I don't use filters or the TCON-T01 extender, but if I did, the CLA-T01 would be needed for these.

I also have a steampunk modification for the TG-5 (TG-2 originally) where I got a small wooden box that looks like a suitcase, and the CAL-T01 allows me to attach the camera to the box, and I can put a lens hood on it, to sort of resemble a bellows.

I recently got the JJC clone version of the LB-T01 that I now attach to the camera when I'm not using it in the steampunk box. I much prefer the LB-T01 over the CLA-T01 plus lens cap. It takes up less space and you don't have the lens cap either dangling on a strap or put in your pocket to hopefully remember to reattach. In the past, I've had lens caps come off, particularly when the TG-5 is just tossed in the luggage unprotected.

<edit>

In terms of other cameras, I never use a 'UV' filter anymore. These were hang overs from shooting film. UV filters helped because film is more sensitive to UV rays above human perception, and you could reduce haze by blocking the UV rays.

On some lenses I do use the modern protection filters that are optically clear and are multi-coated to reduce flare. In general, I tend to only use the protection filters on my lenses that are splash resistant, because it is easier to clean the filter than the lens (this is both for rain as well as mud). I no longer use filters on non-splash resistant lenses. In the past, I tended to use B+W MRC protection filters, now I tend to use Marumi DHG protection filters.