Originally Posted by Canip
With the term „rocking“, I actually meant that when turning the focus wheel, focusing occurs un-evenly in the two tubes as the bridge pushes and pulls the eyepieces up and down un-evenly (too much play in the mechanics). This is a frequent complaint about cheaper porro binoculars.
To answer your question, my specimen is mechanically very stable and the bridge doesn't rock at all in any position, including fully extended. The focusing wheel takes some force to operate, but it's very smooth and has no backlash that I can detect. I guess the extra turning force required is the price one pays for waterproofing. Overall, it's very handy little binocular. I'm always impressed whenever a Porro can meet my eye-relief needs.