Here’s one I made out of a modified IKEA Skubb storage cube. Basically cut windows out the sides & tops, cutting a window out of the plastic reinforcement , leaving just one layer of fabric to act like a diffuser.
Oh, you are a pen(n)alist, too?
Actually, I believe that we’d better transfer that subject onto the PM dept, don’t you agree?
In short: those are the fountain pens that I have in active rotation…
I used to use a light tent made out of white linen (like a bed sheet) and just cut a hole in it for the lens to fit through. I had to photograph historical spoons for a collection.