It's a lens adapter for a Soligor (Soligor Macro 70-220mm F3.5) lens and a Tamron (18-300mm F/3.5-6.3 Di III-A VC VXD) lens.
First I tried it with the Tamron lens and expected it to work because of the macro ‘’ability'' , but in the end I could not get it to work because of the zoom of the macro behavior and the distance from the lens itself.
The adapter works with the Tamron bajonet connection and could probably used for different things aswell.
So I rembered I got another macro lens (Soligor) laying around - made a new adapter and it worked really good. The adapter is press fitted onto the Soligor lens.
Soligor lens:
https://www.pentaxforums.com/userreviews/solig
Tamron Lens:
https://www.tamron.com/global/consumer/lenses/b061/
The colored image was made with an expired kodak film, combined with my lack of knowledge in color conversion from negative to positive - it looks like this. Main use is inverting Black and White film or any kind of 35mm and 24 mm Film.
The author marked this model as their own original creation.