Shoten's R50 Adapters Convert 50mm DSLR Primes into Rangefinder Lenses

Shoten has announced a pair of M-mount rangefinder adapters. The R50 series adapters, the M42-LM R50 and the PK-LM R50, are helicoid mount adapters that convert 50mm prime lenses for M42 and K mount into rangefinder-coupled lenses for M-mount cameras.