https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/R5-Won-t-Allow-Dependable-Focus-with-Older-Model-70-200-f2-8/m-p/484052#M117722 <P>After I purchased the R5, I immediately had focusing problems with my long lens. I have an Canon adapter to use my older lenses. I was told I needed to upgrade my R5 software, and after I managed that, the focusing issue disappeared. After several months of not needing/using the long lens, I now have the same issue with focusing. Any ideas?&nbsp;</P> Sun, 23 Jun 2024 18:25:32 GMT johndd 2024-06-23T18:25:32Z https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/R5-Won-t-Allow-Dependable-Focus-with-Older-Model-70-200-f2-8/m-p/484052#M117722 <P>After I purchased the R5, I immediately had focusing problems with my long lens. I have an Canon adapter to use my older lenses. I was told I needed to upgrade my R5 software, and after I managed that, the focusing issue disappeared. After several months of not needing/using the long lens, I now have the same issue with focusing. Any ideas?&nbsp;</P> Sun, 23 Jun 2024 18:25:32 GMT https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/R5-Won-t-Allow-Dependable-Focus-with-Older-Model-70-200-f2-8/m-p/484052#M117722 johndd 2024-06-23T18:25:32Z https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/R5-Won-t-Allow-Dependable-Focus-with-Older-Model-70-200-f2-8/m-p/484054#M117723 <P>Which model&nbsp;<STRONG>EF 70-200mm F/2.8<FONT color="#FF0000">L</FONT> USM&nbsp;</STRONG>lens do you have. Canon has released 3 IS models and 1 non-IS model. So please provide the full name of the lens you own.</P> Sun, 23 Jun 2024 18:50:16 GMT https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/R5-Won-t-Allow-Dependable-Focus-with-Older-Model-70-200-f2-8/m-p/484054#M117723 deebatman316 2024-06-23T18:50:16Z