Sigma loaned me the 56mm F1.4 DC DN Contemporary for a few weeks I tested the lens at the same time as three of Sigma's other F1.4 primes I had the Canon RF-mount version, and paired the lens with ...

A new dc magnetic field type eddy current speed sensor is presented using an amorphous core of zero-magnetostriction and sharp rectangular B-H loop. In the proposed sensor, a constant dc magnetic flux ...

An original structure of an eddy current sensor meant for nondestructive testing of electrically conducting materials is presented. The basic physical principles of the sensors are recalled, and the ...

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