12-22-2018 06:57 PM
12-23-2018 12:14 PM
It needs service. Contact Canon Support. If you bought it from an authorized dealer, and it is less than a year old, then it should be under warranty.
12-23-2018 12:24 PM - last edited on 12-25-2018 11:35 AM by Danny
"Any ideas pls ?"
Not any good ones! Call Canon 1-800-652-2666 [phone number corrected]
04/16/2024: New firmware updates are available.
RF100-300mm F2.8 L IS USM - Version 1.0.6
RF400mm F2.8 L IS USM - Version 1.0.6
RF600mm F4 L IS USM - Version 1.0.6
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