experience of using 6 days - on the 7th issued a refund. I hope I came across a single instance with a similar design feature of the assembly, because the very quality of the shooting completely suited me. But I don't like the prospect of dust getting inside the lens. Now I will know what other places to look carefully when buying Canon lenses Different pros: I was pleasantly surprised by the sharpness and detail - sometimes even better than that of the whale ef-m 18-55 With its cons. a gap of almost a millimeter between the outer lens and the frame surrounding it - tired of daily cleaning out the dust that constantly clogs there around the entire perimeter