Canon, Konica, Minolta, Olympus, Pentax and Yashica all twist-on the same direction and Nikon is opposite. Shouldn't be an issue anyway since the OP stated "Don't worry about glass, this camera will hitch it's wagon to a 50mm lens only."
Won't the 50mm lens have to be focused?
"She's always out making pictures, She's always out making scenes.
She's always out the window, When it comes to making Dreams.
It's all mixed up, It's all mixed up, It's all mixed up."