STM镜头让对焦更加安静平稳
EF-S 18-55mm f/3.5-5.6 IS STM
EF-S 18-135mm f/3.5-5.6 IS STM
EF-S 55-250mm f/4-5.6 IS STM
EF 24-105mm f/3.5-5.6 IS STM
EF-S 24mm f/2.8 STM
EF 40mm f/2.8 STM
EOS 7D Mark II搭载了全像素双核CMOS AF(Dual Pixel CMOS AF),在搭配使用导螺杆型单元的STM步进马达镜头时对焦驱动安静平稳。STM步进马达镜头的1个脉冲带动步进马达转动1级。构造简单,驱动安静平稳。现在的STM步进马达镜头有EF-S 18-55mm f/3.5-5.6 IS STM 、EF-S 18-135mm f/3.5-5.6 IS STM、EF-S 55-250mm f/4-5.6 IS STM等。