T Mount Spiratone bellows mounted to the Maxxum 7D
This bellows has an integral tripod slider rail with rack and pinion
in addition to the adjustable front and back standards.

Front lens thread is "T" mount (with a T mount threaded 150mm lens shown here) but adapters are available to use Leica thread lenses such as enlarging lenses.

Front and rear rings can be changed also, ie to use Leica threaded M39 enlarging lenses or for easily made custom adapters.