09-09-2015 06:56 PM
09-10-2015 08:46 AM
09-10-2015 09:48 AM
It could be a battery issue if, for example, the autofocus motor has to wait for a weak battery to achieve the minimum necessary voltage. And the fact that it also happens in manual mode may not necessarily be inconsistent with that explanation. As one of the regulars (Ernie Biggs?) pointed out recently, some of Canon's recent lenses are fully electric, with even their manual focusing rings being nothing but a motion sensor.
05/31/2023: New firmware updates are available.
EOS R6 Mark II - Version 1.1.2
05/18/2023: New firmware updates are available.
EOS Rebel T100 - Version 1.1.0
EOS 5D Mark IV - Version 1.4.0
EOS 6D Mark II - Version 1.2.0
PowerShot Elph 360HS - Version 22.214.171.124
PowerShot SX420 IS - Version 126.96.36.199
PowerShot 620 HS - Version 188.8.131.52
PowerShot SX720 HS - Version 184.108.40.206
PowerShot G1X Mark III - Version 220.127.116.11
PowerShot G7X Mark II - Version 18.104.22.168
PowerShot G9X Mark II - Version 22.214.171.124
04/20/2023: New firmware version 1.4.1 is available for EOS R3
03/30/2023: New firmware updates are available.
EOS 1DX Mark III- Version 1.7.1
Speedlite EL-1 - Version 1.0.2
03/30/2023: Product Advisory for EF50 F1.2 L USM
03/30/2023: Product Advisory for EOS R10
2/07/2023: New product announcements!EOS R8 EOS R50RF-S55-210mm F5-7.1 IS STMRF24-50mm F4.5-6.3 IS STMRF15-30mm F4.5-6.3 IS STM
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