do you use to get that effect?
anyway, it's really cool!
It's 2 multi image filters put together,. I have 3-, 4-, and 5-way filters as well as some others. Unfortunately, none of them fit on my digitial camera.
As always, the color/light source is refracted sunlight.
OBTW, I used a Nikon FE2 with a 52mm micro lens for most of my photographic art. It, the camera tha is, has long since been "retired".
Just last month after a decade of wanting one I got a digital SLR that uses my old lenses. Woo hoo! I'm still getting the hang of it and it has dozens of features I'll never use, but woo hoo nonetheless. Your pix are definitely giving me ideas.
Too bad the EOS doesn't use the really good lens from my A1 though. Too old to have any electronics in it.