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Registered: ‎09-13-2014
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Canon EF 100-400mm f/4.5-5.6L IS II USM Lens retracting when pointed almost straight up

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  Waxing Gibbous.jpg

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

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

EOS 1DX and 1D Mk IV and several lenses!
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Re: Canon EF 100-400mm f/4.5-5.6L IS II USM Lens retracting when pointed almost straight up

The lens has a friction ring adjustment.
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"Doctor told me to get out and walk, so I bought a Canon."
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Registered: ‎03-12-2019

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

I use painter’s masking tape on this lens while photographing the moon: it doesn’t leave any tape residue on the lens.
Chris P. Bacon
F-1; AE-1; EOS 1V, 5D Mk IV, 6D, 6D Mk II, 7D, and 7D Mk II
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Re: Canon EF 100-400mm f/4.5-5.6L IS II USM Lens retracting when pointed almost straight up

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.
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"Doctor told me to get out and walk, so I bought a Canon."
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Registered: ‎06-11-2013

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

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).

 

Tim Campbell
5D III, 5D IV, 60Da
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Registered: ‎09-13-2014

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

[ Edited ]

Full Moon April 2019.jpgThanks 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. 

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