07-04-2017, 04:02 PM
Interesting. I just returned from a 7-week trip with my T6i and Canon 17-55/2.8. A significant portion of my shots is front-focused. Last year I took my T6i and Tamron 17-50/2.8 and again a significant amount of shots were front-focused. This winter I was shooting with my T6i and Canon 55-250 mk1 and again some shots were inexplicably front-focused. The effect is similar to that in the Fred Miranda link posted by Rover.
In the past I had a 7D which focused my Tamron 17-50 and Canon 55-250 perfectly, and front-focused my Canon 17-55 when focus was at infinity (headshots were fine).
All these lenses worked fine on my 400D. I never had an issue.
All this has been very frustrating. When you buy a new camera you think you are getting the latest and the greatest, but in terms of autofocus it has been a step backward each time for me. I checked for firmware updates for my T6i but there are none (camera is running 1.0.0)
FWIW live-view gets focus dead-on every time but I hate using it
In the past I had a 7D which focused my Tamron 17-50 and Canon 55-250 perfectly, and front-focused my Canon 17-55 when focus was at infinity (headshots were fine).
All these lenses worked fine on my 400D. I never had an issue.
All this has been very frustrating. When you buy a new camera you think you are getting the latest and the greatest, but in terms of autofocus it has been a step backward each time for me. I checked for firmware updates for my T6i but there are none (camera is running 1.0.0)
FWIW live-view gets focus dead-on every time but I hate using it