topic Re: Stuck 100-400mm IS ii in EF & RF Lenses

Stuck 100-400mm IS ii

MichaelLichtman — Fri, 05 Apr 2024 23:37:33 GMT

While shooting today at 400mm,I was unable to retract the zoom to under approximately 280mm I tried taking the body off, turning the IS, AF, etc off but nothing It glides easily from 400>280 the abruptly stops I looked through the back of the lens and felt for any obstruction but there isn’t one I tried adding my 1.4x tc but no change The lens is operating perfectly at 280-400 What should I do?

Re: Stuck 100-400mm IS ii

shadowsports — Sat, 06 Apr 2024 01:44:27 GMT

Greetings,

Have you tried tilting the lens at different attitudes? Is anything loose or rattling around? Don't force the lens to zoom or MF. If you cannot move the zoom with normal (gentle) firm twist, the lens should go to Canon for inspection.

MyCanon

Re: Stuck 100-400mm IS ii

MichaelLichtman — Sat, 06 Apr 2024 01:44:16 GMT

What could possibly be wrong ? I’m shooting pictures of burrowing owls in FL and zooming in and out, all of a sudden, I couldn’t retract the lens

Re: Stuck 100-400mm IS ii

Waddizzle — Sat, 06 Apr 2024 02:10:44 GMT

Welcome to the forums1

The lens has a friction adjustment. Have you tried to adjust it?

Re: Stuck 100-400mm IS ii

MichaelLichtman — Sat, 06 Apr 2024 02:39:29 GMT

Yes I can control the tightness from 280-400mm, I just can’t get it to close lower than 280mm