https://community.usa.canon.com/t5/EF-RF-Lenses/24-105-f-4L-focusing-problem/m-p/364938#M22584 <P>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.</P><P>I’ve tested on three cameras- 5Dsr, 6D, and 80D- with identical results. I’m not using microadjust on any of the cameras. I bought the lens new in 2013 and it’s worked great up until just recently. My other lenses all focus accurately.</P><P>Is there a lens reset procedure or does it need to go in for repair? I’ve checked the Canon website and haven’t found any real info about this particular issue.</P><P>TIA for any info.</P> Mon, 07 Mar 2022 23:34:13 GMT Lumigraphics 2022-03-07T23:34:13Z https://community.usa.canon.com/t5/EF-RF-Lenses/24-105-f-4L-focusing-problem/m-p/364938#M22584 <P>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.</P><P>I’ve tested on three cameras- 5Dsr, 6D, and 80D- with identical results. I’m not using microadjust on any of the cameras. I bought the lens new in 2013 and it’s worked great up until just recently. My other lenses all focus accurately.</P><P>Is there a lens reset procedure or does it need to go in for repair? I’ve checked the Canon website and haven’t found any real info about this particular issue.</P><P>TIA for any info.</P> Mon, 07 Mar 2022 23:34:13 GMT https://community.usa.canon.com/t5/EF-RF-Lenses/24-105-f-4L-focusing-problem/m-p/364938#M22584 Lumigraphics 2022-03-07T23:34:13Z https://community.usa.canon.com/t5/EF-RF-Lenses/24-105-f-4L-focusing-problem/m-p/364940#M22585 <P>There is no reset. If it is happening on all cameras it is a lens issue. It looks like Canon still services that lens.</P> Mon, 07 Mar 2022 23:39:24 GMT https://community.usa.canon.com/t5/EF-RF-Lenses/24-105-f-4L-focusing-problem/m-p/364940#M22585 jrhoffman75 2022-03-07T23:39:24Z