New answers tagged macro-converter
Close-up lenses are just lenses reduced to their most basic. They will have all of the distortions and aberrations you would expect in a simple lens made from not-very-exotic materials, and those problems will get worse with increasing diameter. If you were using them on their own, they'd be horrible (and saved from being even worse by their relatively small ...
I believe the size matters based on your lens, quality won't differ if it is 58mm or 72mm. Check which size fits your lens. P.S.: If it is a gift then I think you won't be able to choose :)
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