Yes, I've seen that effect, it really looks pretty cool!

These are absolutely adorable! I think your art is always worth posting!

You're welcome!

Awesome photo!

Any spring-flowering bulbous plant that I've never photographed before. flower

Here's the spreadsheet: lisichko.gitlab.io/ffiles/colou...
It was intended for personal use, so it may not be the prettiest one, and it can contain errors. The glass type names are transliterated from Cyrillic to Latin letters (like UFS = УФС, IKS = ИКС, and so on)

It has a dual band pass spectrum, so you have to deal with IR somehow (i.e., using an IR-block filter). Using just this glass alone, you'll get an IR shot with most cameras.

I can post a spreadsheet with the old USSR-made glass types/names and the spectra they pass/block a bit later if you're interested. They are still sold on marketplaces from time to time, and at least one factory in Ukraine had them in their price list just before the russian invasion.

Yes, of course. I use an old UV-pass glass UFS-6 that I found at a local marketplace, where it was cheap, but not always available. This sort of glass (and some similar ones) was used in luminescent microscopy, in spectrophotometers, etc., not sure where mine was used exactly.

Yes, I do. It's not really a dedicated photographic filter, but it does its job.

Yes, its red channel signal is quite strong too. But with this filter, it's possible to get an image like this one (bsky.app/profile/cher...) right from the camera, while the one in this post required changing the white balance in post-editing.

Yes, you are right; it's a camera with the UV/IR-cut filter removed, and this photo was taken with the FS-7 filter, so it's mostly IR with some visible light from the violet-blue part of the spectrum. (The filter is made to pass 300-440 nm and 720-1100 nm regions of the spectrum.)

Прекрасна робота! Такі гарні лапки і форми!