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I have a 24-105mm f/4L series I that is front focusing badly, but only at the wide angle end. Above about 50mm, focus seems accurate but at 24mm, what should be infinity instead gives me in the 3-5 meter range. It slowly gets better as I zoom out.I’v...

I use a Lenovo ThinkCentre Edge desktop at work running Windows 10 Professional x64 build 15063.413, EOS Utility 2.14.20.0, Rebel T5i, Adobe Bridge CC 2017 7.0.0.93 x64. Bridge and EOS Utility running in separate desktops using Task View. I have sele...