topic Canon EF 100-400mm f/4.5-5.6L IS II USM Lens retracting when pointed almost straight up in EF & RF Lenses

Canon EF 100-400mm f/4.5-5.6L IS II USM Lens retracting when pointed almost straight up

Mitsubishiman — Mon, 15 Apr 2019 14:16:21 GMT

I searched and did not find a topic on this, any suggestions, my issue is, with my Manfrotto 190 set sideways so I can take a shot almost straight up, the weight of the lense tracked out is sufficient enough to case it to retract under its own weight, I can get the shot but I have to hold on to the lens with one hand, any suggestions, I could do a much better job on the focus if I had both hands free

Re: Canon EF 100-400mm f/4.5-5.6L IS II USM Lens retracting when pointed almost straight up

ebiggs1 — Mon, 15 Apr 2019 14:51:01 GMT

A rubber band or some of those squishy things girls wear in their hair. Pretty easy and pretty common fix.

Re: Canon EF 100-400mm f/4.5-5.6L IS II USM Lens retracting when pointed almost straight up

Waddizzle — Mon, 15 Apr 2019 15:27:26 GMT

The lens has a friction ring adjustment.

Re: Canon EF 100-400mm f/4.5-5.6L IS II USM Lens retracting when pointed almost straight up

ChrisPBacon — Thu, 18 Apr 2019 15:34:34 GMT

I use painter’s masking tape on this lens while photographing the moon: it doesn’t leave any tape residue on the lens.

Re: Canon EF 100-400mm f/4.5-5.6L IS II USM Lens retracting when pointed almost straight up

Waddizzle — Thu, 18 Apr 2019 16:59:52 GMT

The friction ring should be strong enough to “lock” the zoom in place. If not, get it checked. You could have something being stripped inside the lens, creating who knows what sort of future havoc.

Re: Canon EF 100-400mm f/4.5-5.6L IS II USM Lens retracting when pointed almost straight up

TCampbell — Thu, 18 Apr 2019 23:34:39 GMT

As Wadizzle points out ... the 100-400 II has a "tension" ring to prevent zoom creep. After you zoom, snug that ring. If the zoom still creeps after snugging the tension, then the lens probably needs an adjustment (send it in to Canon).

Re: Canon EF 100-400mm f/4.5-5.6L IS II USM Lens retracting when pointed almost straight up

Mitsubishiman — Sat, 20 Apr 2019 04:19:07 GMT

Thanks for the information, I was not aware of the tension ring, so I feel a bit ignorant, it works as described, it was all the way open thus no tension, works perfect.