To attach your Macro 4/3 System DSLR camera to lenses, telescopes, microscopes, enlargers, and bellows attachments that have a T-Mount thread. This adapter will work with any macro 4/3 system camera body.
will this adapter work with a samyang 500 mm lens?
I currently have my adapter on a tou five star 500mm T-mount lens, which is pretty much the same as your samyang. I will however inform you that using this on micro 4/3 means that it will become a 1000mm equivalent lens. It is greatly recommended that you obtain a solid tripod to use it with!