What Is USM type in canon lenz?

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What Is USM type in canon lenz?

some of the canon lenz have USM word on body of them.
what is this word?
and what is diffrent of this type of lenz with others?

2007-02-10 01:02:24 · 1 answers · asked by alimha 1 in Arts & Humanities ➔ Visual Arts ➔ Photography

1 answers

It stands for ultra sonic motor. It is a supposedly quieter, quicker motor for focusing the lens. It generally goes for a higher price than the non-usm variety

2007-02-10 01:38:56 · answer #1 · answered by Bob 6 · 0⤊ 0⤋