04-06-2021 09:01 AM
I was wondering if there were any known issues between the Canon 90D and the
Canon EF 70-300mm f/4-5.6L IS USM Lens. I've worked on obtaining sharp focus for about 6000 pictures and cannot accomplish it. Switch to the new 18-135 Nano and they are tak sharp. Switch the lens back to my old 70D, tak sharp. I've tried every setting I could find related to focus. Over exposure is a serious problem too, I'm sending it back to Amazon if there are no known issues.
04-07-2021 09:17 AM
After multiple emails and phone calls I was able to reach someone Canon Engineering support group to discuss an issue with my new Canon 90D. At first I thought the issue was a lens compatiabilty issue, but after reviewing the pictures exif information, it was determined the camera and the lens are compatiable. The issues (bug) is with the flash mode, which prevents the camera from communicate properly with the lens. Basically when I turn the flash on, the lens camera thinks the 105mm lens is a 24mm lens. Turn off the flass and everything is fine. The technician I spoke to said they are aware of this issue and it should be fixed in the next firmware release. He couldn't tell me when they are planning on releasing the firmware update, but thought it would be soon.
04-07-2021 10:19 AM
I'm calling them today about my concerns with exposure and focus at 300 with my lens on the 90D
04-07-2021 10:54 AM
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 18.104.22.168
PowerShot SX420 IS - Version 22.214.171.124
PowerShot 620 HS - Version 126.96.36.199
PowerShot SX720 HS - Version 188.8.131.52
PowerShot G1X Mark III - Version 184.108.40.206
PowerShot G7X Mark II - Version 220.127.116.11
PowerShot G9X Mark II - Version 18.104.22.168
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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