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looks good to me, considering that the price for those filters are 20$ each in the store. Too bad I cant make out what fabricate it is on those pics.
Remember when you use teleconverters and wideangleconverters you loose small amounts of lights (aperture steps) which you have to compensate with a bit longer shutterspeed. In this case, 0.45x magnification doesn't steal too much light, I'd say probably just 1/2 or 1/3 step, so there's not much to worry about.
From what I've heard, those microfiber cloths aren't recommended to clean lens surfaces with, I'd recommend using cotton moistened with clean alcohol instead.

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