[cablewiz]

Hey all,

What's USM stand for?
Thank you so much.

wizwiz

[cablewiz]

美 國 海 軍 陸 戰 隊 --------------> Huh?

EF 70-200mm f/2.8 USM -------------> what about this?

[maximilianyuen]

Underwater-to-Surface Missile 水下對水面[地面]導彈

Unlisted Securities Market

United States Mail 美国邮政

United States Marine 美国海运

United States Minto 美国造币局

EF 70-200mm f/2.8 USM -------------> what about this?
Ultra Sonic Motor
USM, a technology for autofocusing that stands for "Ultrasonic Motor." USM was a term they first started using in 1987 when they developed a new fast and quiet motor, which they dubbed a "ring ultrasonic motor" -- the motor uses tiny vibrations to generate rotation. As the term "ring" implies, the autofocusing mechanism sits in a ring around the optics of the camera, and most importantly, it allows you to do manual focusing even when in auto focus mode.

[kingkonghk]

>>Underwater-to-Surface Missile 水下對水面[地面]導彈

我淨係識home to home missile, 胸隊胸飛旦.......... 仲有unsharp mask都係叫usm

[kingkonghk]

2~~~椅, 令我聯想到sms添, sm為1次, sms係sm o既眾數

[xeonlee]

簡單. usm 咪就係 U, S 同埋M
law

[Ah Chai]

哈！哈！哈！

[A.T.]

Un - stable motor

[凱飛花]

sms...................

[maximilianyuen]

ultra stupid man

[凱飛花]

gd!!!!!!!!!!!!