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Viltrox EF-EOS M2 – Speedbooster x0.71 for EF Lenses on EOS M with AF
Hi, i got this new Speedbooster yesterday from eBay for €145.-. I didn't had the time to do some real photos with it but from my short testing it seems that AF is much slower with this booster and you need more light, despite the fact that it increases the amount of light hitting the sensor. It...