Shimano Nexus – hub dynamo, as it's oft referred to as. But that's wrong, as it generates alternating current, it's a hub alternator.



Nikon F100 : f/2.8 : 1/30" : 55mm : ISO 400

Lens: Micro-Nikkor 55mm f/2.8 AIS 
Film: Ilford XP2-Super 400 (B&W negative)

[Frame : 02A]