I have just purchased an Olympus TG5 following it's great reviews on here. I intend to use it with remote flashes, either using my old fireflies or the Yongnuo type flashes. I blame all of this on winning a Peli case from the UKC hidden earth raffle. I need something to put in it!
Anyway, I have keenly followed various threads, but this one has been of particular interest regarding the use of a Tg camera with a Yongnuo flash here: https://ukcaving.com/board/index.php?topic=24506.0
The TG series of cameras - at least 3, 4 & 5 have a removable bezel in which you can attach various addons. I have used this attachment as the basis to design and 3D print a couple of covers which can easily be attached to the camera without tape etc, and also allow it to be as slimline as possible to keep the overall size down.
I have done a couple of designs to test out. The first is a lens cover which opens up to screen the flash. The second is a fixed cover for the flash.
They both allow a little bit of light through the print, but it is highly diffused and even across the shot. As they do not cover the flash fully they allow quite a bit of light out - outside of the camera angle, so hopefully they will let out enough light for a flash to see. If not it is easy to add a hole in the covers to glue in a bit of film.
This is a work in progress and I have no idea when I'll be able to test them out properly.
Let me know your thoughts.