Kicko, makinon made lenses for the specific cameras in the same way that Sigma and Tamron do.

If your lens is a Pentax K mount then it will fit on your K7 presumably but if it was made originally for a Canon , Nikon or a Minolta then i think you will be out of luck.

Take a pic of the lens mount (camera end of the lens) and post it here and some knowledgeable person will be able to identify it.