Tale of two rotors (1)

The rotor on the right is a stock rotor from a BMC 300-watt motor that uses a 16-pole ceramic ring magnet. The rotor on the left was modified by Paul Montgomery with 20 Neodymium "high-temperature" (150C) magnets, turning the motor into a 20-pole device.

2010/11/2 16:44:17

Exposure mode: program (auto)
Metering Mode: matrix
Exposure time: 0.0080 s (1/125)
Aperture: f/2.8
Focal length: 8.0mm (35mm equivalent: 37mm)
ISO: 400
Flash: No
File size: 1951394 bytes
Camera maker: FUJIFILM
Camera model: FinePix F10
Resolution: 2718 x 1812