Dave_E Offline Upload & Sell: On
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I had the same issue with my EF 400 DO II lens, and ended up trying a Zemlin hood. A twist and lock it works like dream, solid lock on in either full or have size. I liked it so much I got them for my RF400 f2.8 and RF600 f4. Now I never worry about those screws coming loose and the hoods falling off.
Dave
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