this is a macro lens for smartphones that are designed to take a picture of a macro, if your smartphone can not take photos with macros then with this extra lens is very petrified for macro photos,
how it works very easy just put this lens in your hp camera,,
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and this is some of the results I've photographed and previously I've posted in steemit the result is quite satisfactory and not much different results with the camera canon or with another camera,
Regards 