EF & RF Lenses
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Short focus

My 100-400 IS seems to be focusing about 6 inches short of the intended subject.  Is there adjustments in the 7D that can help with that?

Nuce by Apprentice
  • 1 replies

Is it worth calibrating a new lens?

Hi everyone! I am a total "noob" (as my kids would say) to photography.  I am just getting into it as a hobby and because my son and I want to start doing stop-motion videos and general photography for fun. I have picked up a Canon T4i with the 55-8...

mikeB by Contributor
  • 3 replies

Resolved! How do you update lens firmware?

I see that a firmware update for my EF 40mm f/2.8 STM lens is available.  How do you update the firmware on the lens?  The Canon website shows the downloadable file, but what do I do after I download the file?


I had a quick question for the experts(or anybody) out there. I recently purchased a Rebel T4I. Im currently using an 18-135 IS and a 55-250 IS lenses. Im looking to do a lot of wildlife shots. I was wondering what kind of lense i could buy that woul...

ACESFULL by Contributor
  • 10 replies

60d lens w/ TC

Does AF work wile using a 100-400 zoom and a 1.4 TC on a 60d? Thanks for your help!

ssmith by Apprentice
  • 2 replies
Getting started

New to the community? Here's some information to help you get acquainted:

03/28/2023: New firmware version is available for EOS-R5 C
03/14/2023: New firmware version 1.8.1 is available for EOS R6

03/02/2023: New Firmware Updates Are Available:

EOS R7 - Version 1.3.0EOS R10 - Version 1.3.0
02/24/2023: We've updated Share Your Photos

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
01/18/2023: New firmware version 1.1.1 is available for EOS R6 Mark II
01/09/2023: Help ensure your autofocus is properly aligned with a Canon Precision Alignment
01/03/2023: Welcome to CES 2023!
12/08/2022: New firmware version is available for EOS C70
12/07/2022: New firmware version 1.7.0 is available for EOS R5
11/22/2022: New firmware available for EOS R3, EOS R7 and EOS R10
11/16/2022: We're thrilled to be ranked among the Best Employers for Veterans in 2022 by Forbes.
08/31/2022: New firmware version 1.1.1 is available for RF 70-200mm L IS USM
08/09/2022: New firmware version 1.2.0 is available for CR-N 300
08/09/2022: New firmware version 1.2.0 is available for CR-N 500
07/14/2022: New firmware version 1.0.1 is available for CR-X300
06/10/2022: Service Notice:UPDATE: Canon Inkjet Printer continuous reboot loop or powering down
06/07/2022: New firmware version 1.3.2 is available for PowerShot G7 X Mark III
05/31/2022: Did someone SAY Badges?
05/26/2022: New firmware version is available for EOS-C500 Mark II
05/26/2022: New firmware version is available for EOS-C300 Mark III
05/10/2022: Keep your Canon gear in optimal condition with a Canon Maintenance Service
05/05/2022: We are excited to announce that we have refreshed the ranking scale within the community!
03/23/2022: New firmware version is available for EOS-C70
02/09/2022: Share Your Photos is back!
02/07/2022: New firmware version 1.6.1 is available for EOS-1DX Mark III
01/13/2022: Community Update. We will be retiring the legacy profile avatars on 01/20/2022. Click this link to read more.