https://community.usa.canon.com/t5/EF-RF-Lenses/EF100-400-4-5-5-6-L-IS-Zoom-does-not-slide-easily/m-p/541173#M36979 <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="IMG_0387.jpeg" style="width: 5712px;"><img src="https://community.usa.canon.com/t5/image/serverpage/image-id/65358i18BE2FB8E1C1A38F/image-size/medium?v=v2&amp;px=400" role="button" title="IMG_0387.jpeg" alt="IMG_0387.jpeg" /></span></P><P> </P><P>Having some trouble with my zoom lens grinding and scraping on the shaft. When changing tension ring all the way to smooth there is still so much resistance it scrapes. See pic attached</P> Mon, 24 Mar 2025 21:24:17 GMT Samwicensis 2025-03-24T21:24:17Z https://community.usa.canon.com/t5/EF-RF-Lenses/EF100-400-4-5-5-6-L-IS-Zoom-does-not-slide-easily/m-p/541173#M36979 <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="IMG_0387.jpeg" style="width: 5712px;"><img src="https://community.usa.canon.com/t5/image/serverpage/image-id/65358i18BE2FB8E1C1A38F/image-size/medium?v=v2&amp;px=400" role="button" title="IMG_0387.jpeg" alt="IMG_0387.jpeg" /></span></P><P> </P><P>Having some trouble with my zoom lens grinding and scraping on the shaft. When changing tension ring all the way to smooth there is still so much resistance it scrapes. See pic attached</P> Mon, 24 Mar 2025 21:24:17 GMT https://community.usa.canon.com/t5/EF-RF-Lenses/EF100-400-4-5-5-6-L-IS-Zoom-does-not-slide-easily/m-p/541173#M36979 Samwicensis 2025-03-24T21:24:17Z https://community.usa.canon.com/t5/EF-RF-Lenses/EF100-400-4-5-5-6-L-IS-Zoom-does-not-slide-easily/m-p/541251#M36983 <P>You have some grot in the mech. It needs to be cleaned but Canon doesn't service that lens any longer so a private repair shop might be able to do it.</P> Tue, 25 Mar 2025 14:06:37 GMT https://community.usa.canon.com/t5/EF-RF-Lenses/EF100-400-4-5-5-6-L-IS-Zoom-does-not-slide-easily/m-p/541251#M36983 ebiggs1 2025-03-25T14:06:37Z