The £20 is pretty awful optically. Some people can tolerate the view for £20 and get away with it - I can't. Others posting the good review have bought the £50/£60 version, which is a different animal altogether. For £20 you get a 3-element Zoom with 2x plastic lenses, with a glass lens on top. So there is no edge blackening, and no multi coating - just good old plastic tat. You can take it to bits, and buy glass elements for it That's what I did. The choice for me was to bin it, or make
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