To keep the price down, that often means their optical performance is compromised and the choice of focal lengths limited.
ECONOMIST: A die-hard analog photographer goes digital
Optical scanning systems have a 98% accuracy rate, which means an unacceptable 40 errors per page.
FORBES: Magazine Article
This means that someone bought a physical copy, cut the spine, scanned the pages and used optical character recognition (OCR) to get a first draft.
FORBES: DRM: Not All It��s Cracked Up To Be
应用推荐
模块上移
模块下移
不移动