Hi Neuro...


The switch was set to 1.2 and the subject was more than 2.5m away.


I performed some basic tests and the lens is neither front/back focusing. With the original lens I was able to zoom in and obtain lock on a vine leaf, with this lens, it's having a hard time obtaining lock. I have to constantly keep pressing the button to find lock.


Could this be camera body related or lens or both? The 24-105 does not exhibit this issue.