LA difracción es muy alta, daña toda la definición de la imagen, no vale la pena para nada. Quedaría mejor hacer una ampliación digital, hay menos perdida de definición en la imagen. El aumento que da es pobre. La difracción es tan obvia que mirando a través del lente se nota. Read more

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I bought this auxillary teleconverter lens primarily to use with my 75mm f1.8 1.33x squeeze anamorphic lens to give it more reach. While the converter does not seem as powerful as advertised, it does increase the effective telephoto effect to that of about a 135mm lens with no change in f-stop (unlike a traditional teleconverter). Photo is uncropped. Anamorphic lenses typically have the most distortion at the sides since they shoot like a wider angle lens horizontally, use of a converter would only increase it. Here you can see there is virtually none. So now it is like I have a lens that costs at least $1200, plus it is 1 f-stop faster. Read more