When you focus the first time after it has not been used over night, it is a bit sticky. After that it is smooth. I suspect the O ring seal is breaking in. It is a very minor fault in a superior product. I wear it around my neck. It is readily available, I can use it without taking my glasses off, it focusses well, the entire image is crisp and clear to the edges, and it goes everywhere with me on walks, hikes, and mountain bike rides. The close focus is really handy where observing hummingbirds on my home feeders.
Pros: Compact, great focusing, generous eye relief, and superior quality...
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