I think you will find mating bayonet lenses onto your M42 a challenge. I know that Canon did a nice little adaptor ring that allowed using M42 lenses on their bodies. There was no automation and you had to use stop down metering. This mount was manufactured quite some time ago. I picked mine up in the early seventies. I have never heard of manufacturers making adaptors to allow their lenses to fit M42 bodies but I could easily be wrong in assuming that such adapters dont exist. Zoerk the renknowed adaptor manufacturer could manufacture something to order but it will cost a lot of money.