machining a B to F mount adapter ring

[tron]

helloo

okay so i have a praktica b100 with a lot of lenses for it. i also have a nikon d40. i would like to mount my praktica (b mount) to the nikon (f mount) i cant find the appropriate adapter however.

im pretty handy in a machine shop, so i could just make my own. i just had a question in regards to the materials. what are most adapter rings made out of? would aluminum be bad for the mounting surface of my d40? what should i opt to make the mount out of?

 

[Joves]

Well most mounts are made from aluminum. I have yet to own an adapter myself.

 

[daveismissing]

I suppose you want the adapter to be softer, thus not wear either lens or camera?
Brass?

 

[Eldrich]

you'd might be safest to match the threads (is it threads?) you'd be screwing into so they didn't seize up with any change in temperature.

 

[tron]

couldnt i just hack up the praktica lens to make it fit?