[stevediaz]

Hello

 

I'm facing some perplexing autofocus issues with my photography setup, comprising of the Canon EOS 80D paired with the Canon EF-S 18-135mm lens. Despite many attempts to troubleshoot, I'm still facing  with inconsistencies in autofocus performance, particularly noticeable variations in focusing speed and accuracy across different lighting conditions and focal lengths.

 

 

I've observed instances of misfocus and sluggish autofocus behavior, which significantly impact my ability to capture sharp and well-focused images reliably. I've  checked and adjusted the camera settings, including autofocus modes and area selection, but the issue still there.

 

If anyone has faced similar issues with the autofocus system of Canon EOS 80D and Canon EF-S 18-135mm lens, I would greatly appreciate any suggestion troubleshooting steps to rectify this issue and restore optimal autofocus performance.

 

Your expertise and guidance would be immensely valuable in overcoming this issue. Thank you for your  support!

 

Warm regards,

stevediaz

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[toni-a]

80D is a SLR camera, SLR cameras use different sensors for focus and capturing images, they need calibration to have optimal results and this calibration, you need it for each and every single lens you use.
That's why 80D has a function called AFMA (AutoFocus Micro Adjustment)
Canon even have a guide on how to use it on their website in desktop and mobile versions
Here's the desktop version
https://support.usa.canon.com/resources/sites/CANON/content/live/ARTICLES/175000/ART175504/en_US/AF_MicroAdjustGuide_desktop.pdf

[Timothy]

80D is a SLR camera, SLR cameras use different sensors for focus and capturing images, they need calibration to have optimal results and this calibration, you need it for each and every single lens you use.
That's why 80D has a function called AFMA (AutoFocus Micro Adjustment)
Canon even have a guide on how to use it on their website in desktop and mobile versions
Here's the desktop version
https://support.usa.canon.com/resources/sites/CANON/content/live/ARTICLES/ slope game/ 175000/ART175504/en_US/AF_MicroAdjustGuide_desktop.pdf

Thank you!

[MLonlooker]

Hi,
  I don't know the Canon 80D camera, I shoot Nikon, however the symptoms you are describing of general strange erratic AF behaviour are similar to the issues I have had with Nikon DSLRs ..... often it's dust on the AF detector prisms under the mirror, remove the lens ..... (with the Nikon I go to clean sensor/raise mirror or the Canon equivalent in the menu) and then with the mirror in the raised position, use a rocket blower to blow off any dust which may have settled on the AF prisms under the mirror, it's a 5 minuet job which usually does the trick .  
    If you haven't a rocket blower they are cheap as chips on ebay and are very useful.
  Certainly that would be my first port of call.
good luck ......

[bagptarmigan]

Hi,
     I don't know the Canon 80D camera, I shoot Nikon, however the symptoms you are describing of general strange erratic AF behaviour are similar to the issues I have had with Nikon DSLRs ..... often it's dust on the AF detector prisms under the mirror, remove the lens ..... (with the Nikon I go to clean sensor/raise mirror or the Canon equivalent in the menu) and then with the mirror in the raised position, use a rocket blower to blow off any dust which may have settled on the AF prisms under the mirror, it's a 5 minuet job which usually does the trick .  
    If you haven't a rocket blower they are cheap as chips on ebay and are very useful.

pizza tower

  Certainly that would be my first port of call.
good luck ......

Thanks for the tip! I've been having similar issues with my Canon 80D, and I never considered the possibility of dust on the AF detector prisms. I’ll definitely try using a rocket blower as you suggested. Hopefully, this will solve the problem. Appreciate the advice—fingers crossed it works!