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this is a great review! thanks man

These kinds of conversion lenses are only intended to be used at the zoomed in view, not to provide the full range of wide angle to telephoto. It's basically a magnifying glass on your camera, which is why you get the rounded edges when you zoom back out. There may be a software setting on your camera to tell it you're using a telephoto and then it won't let you zoom out past the point where it's intended to be used. Personally I hate these kinds of conversion lenses--I bought one for a still camera I had without realizing the implications and I returned it as soon as I realized how it really worked.