Pentacon 50mm 1.8 on D7000

[lexaniji]

i recently bought myself a second hand Praktica BMS with a 28 and 50mm lens and a flash and all. i was wonderig if the 50mm and the 28mm will fit on my Nikon D7000 with an adapter? the lenses got a PB mount. i hope they will fit!

thanks in advance!