EOS 80D’s [Movie Servo AF speed] is settable when [Movie Servo AF] is set to [Enable] and [AF method] is set to [FlexiZone - Single]. Additionally, this function is only enabled when using the following lenses compatible with slow focus transition during movie shooting. (USM lenses released in 2009 or later and STM lenses are compatible with this function.)

EF-S24mm f/2.8 STM

EF24mm f/2.8 IS USM

EF28mm f/2.8 IS USM

EF40mm f/2.8 STM

EF35mm f/1.4L II USM

EF35mm f/2 IS USM

EF50mm f/1.8 STM

EF100mm f/2.8L Macro IS USM

EF300mm f/2.8L IS II USM

EF400mm f/2.8L IS II USM

EF400mm f/4 DO IS II USM

EF500mm f/4L IS II USM

EF600mm f/4L IS II USM

EF8-15mm f/4L Fisheye USM

EF-S10-18mm f/4.5-5.6 IS STM

EF11-24mm f/4L USM

EF-S15-85mm f/3.5-5.6 IS USM

EF-S18-55mm f/3.5-5.6 IS STM

EF-S18-135mm f/3.5-5.6 IS STM

EF-S18-135mm f/3.5-5.6 IS USM

EF24-105mm f/3.5-5.6 IS STM

EF-S55-250mm f/4-5.6 IS STM

EF16-35mm f/4L IS USM

EF24-70mm f/2.8L II USM

EF24-70mm f/4L IS USM

EF70-200mm f/2.8L IS II USM

EF70-300mm f/4-5.6L IS USM

EF100-400mm f/4.5-5.6L IS II USM

EF200-400mm f/4L IS USM Extender 1.4x