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EOS C300 Mark III Support
FAQs & troubleshooting

With some EF lenses, the camcorder may take longer to focus automatically or may not be able to focus correctly. (EOS C500 Mark II, EOS C300 Mark III)

Content Id: 8204734100


With the EF lenses listed below, it may take longer to achieve focus, or correct focus may not be achieved.

(As of March 2020)

EF 50mm f/1.4 USMEF 50mm f/1.8 IIEF 50mm f/2.5 Compact Macro
EF 75-300mm f/4-5.6 IIIEF 75-300mm f/4-5.6 III USMEF 100mm f/2.8L Macro USM
EF 15mm f/2.8 FisheyeEF-S 18-55mm f/3.5-5.6EF-S 18-55mm f/3.5-5.6 II
EF-S 18-55mm f/3.5-5.6 USMEF-S 18-55mm f/3.5-5.6 II USMEF 20-35mm f/2.8L
EF 22-55mm f/4-5.6 USMEF 24mm f/2.8EF 28mm f/2.8
EF 28-70mm f/3.5-4.5EF 28-70mm f/3.5-4.5 IIEF 28-80mm f/3.5-5.6
EF 28-80mm f/3.5-5.6 IIEF 28-80mm f/3.5-5.6 II USMEF 28-80mm f/3.5-5.6 III USM
EF 28-80mm f/3.5-5.6 IV USMEF 28-80mm f/3.5-5.6 V USMEF 28-90mm f/4-5.6
EF 28-90mm f/4-5.6 IIEF 28-90mm f/4-5.6 IIIEF 28-90mm f/4-5.6 USM
EF 28-90mm f/4-5.6 II USMEF 28-105mm f/4-5.6EF 28-105mm f/4-5.6 USM
EF 28-200mm f/3.5-5.6EF 28-200mm f/3.5-5.6 USMEF 35mm f/2
EF 35-70mm f/3.5-4.5EF 35-70mm f/3.5-4.5AEF 35-80mm f/4-5.6
EF 35-80mm f/4-5.6 IIEF 35-80mm f/4-5.6 IIIEF 35-80mm f/4-5.6 USM
EF 35-80mm f/4-5.6 PZEF 35-105mm f/3.5-4.5EF 35-105mm f/4.5-5.6
EF 35-105mm f/4.5-5.6 USMEF 35-135mm f/3.5-4.5EF 38-76mm f/4.5-5.6
EF 50mm f/1.8EF 50-200mm f/3.5-4.5EF 50-200mm f/3.5-4.5L
EF 55-200mm f/4.5-5.6 USMEF 55-200mm f/4.5-5.6 II USMEF 70-210mm f/4
EF 75-300mm f/4-5.6EF 75-300mm f/4-5.6 IIEF 75-300mm f/4-5.6 USM
EF 75-300mm f/4-5.6 II USMEF 75-300mm f/4-5.6 IS USMEF 80-200mm f/2.8L
EF 80-200mm f/4.5-5.6EF 80-200mm f/4.5-5.6 IIEF 80-200mm f/4.5-5.6 USM
EF 90-300mm f/4.5-5.6EF 90-300mm f/4.5-5.6 USMEF 100mm f/2.8L Macro
EF 100-200mm f/4.5AEF 100-300mm f/5.6EF 100-300mm f/5.6L
EF 135mm f/2.8 (equipped with soft focus mechanism)EF 400mm f/2.8L USM-
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