Quote Originally Posted by septim View Post
Would it be worth borrowing/buying an adapter to use it on my K mount body (along with a Super Takumar) or should I invest in some K mount lenses instead?

I'd get an m42 to K mount adaptor they are very cheap, that will allow the use of any M42 mount lenses on a Pentax or any other camera with a K mount. You will have to stop the sperture down manually though.