Lenses That Take Longer to Focus in 4K Movie Recording (Contrast AF)

With the following lenses, focusing with contrast AF during 4K movie recording may take longer or be more difficult than during Full HD or HD movie recording (as of May 2023).

This information applies to the cameras noted below.

EOS R100

Type of Lens	Lens Name
EF lenses	EF15mm f/2.8 Fisheye
	EF24mm f/2.8
	EF28mm f/2.8
	EF35mm f/2
	EF50mm f/1.4 USM
	EF50mm f/1.8
	EF50mm f/1.8 II
	EF50mm f/2.5 Compact macro
	EF100mm f/2.8 Macro
	EF100mm f/2.8 Macro USM
	EF135mm f/2.8 Softfocus
	EF400mm f/2.8L USM
	EF20-35mm f/2.8L
	EF22-55mm f/4-5.6 USM
	EF28-70mm f/3.5-4.5
	EF28-70mm f/3.5-4.5 II
	EF28-80mm f/3.5-5.6
	EF28-80mm f/3.5-5.6 II
	EF28-80mm f/3.5-5.6 II USM
	EF28-80mm f/3.5-5.6 III USM
	EF28-80mm f/3.5-5.6 IV USM
	EF28-80mm f/3.5-5.6 V USM
	EF28-90mm f/4-5.6
	EF28-90mm f/4-5.6 USM
	EF28-90mm f/4-5.6 II
	EF28-90mm f/4-5.6 II USM
	EF28-90mm f/4-5.6 III
	EF28-105mm f/4-5.6
	EF28-105mm f/4-5.6 USM
	EF28-200mm f/3.5-5.6
	EF28-200mm f/3.5-5.6 USM
	EF35-70mm f/3.5-4.5
	EF35-70mm f/3.5-4.5 A
	EF35-80mm f/4-5.6
	EF35-80mm f/4-5.6 PZ
	EF35-80mm f/4-5.6 USM
	EF35-80mm f/4-5.6 II
	EF35-80mm f/4-5.6 III
	EF35-105mm f/3.5-4.5
	EF35-105mm f/4.5-5.6
	EF35-105mm f/4.5-5.6 USM
	EF35-135mm f/3.5-4.5
	EF38-76mm f/4.5-5.6
	EF50-200mm f/3.5-4.5
	EF50-200mm f/3.5-4.5L
	EF55-200mm f/4.5-5.6 USM
	EF55-200mm f/4.5-5.6 II USM
	EF70-210mm f/4
	EF75-300mm f/4-5.6
	EF75-300mm f/4-5.6 USM
	EF75-300mm f/4-5.6 IS USM
	EF75-300mm f/4-5.6 II
	EF75-300mm f/4-5.6 II USM
	EF75-300mm f/4-5.6 III
	EF75-300mm f/4-5.6 III USM
	EF80-200mm f/2.8L
	EF80-200mm f/4.5-5.6
	EF80-200mm f/4.5-5.6 USM
	EF80-200mm f/4.5-5.6 II
	EF90-300mm f/4.5-5.6
	EF90-300mm f/4.5-5.6 USM
	EF100-200mm f/4.5A
	EF100-300mm f/5.6
	EF100-300mm f/5.6L
EF-S18-55mm f/3.5-5.6
EF-S18-55mm f/3.5-5.6 USM
EF-S18-55mm f/3.5-5.6 II
EF-S18-55mm f/3.5-5.6 II USM