I was hesitant to buy from this brand. I just recently bought a Sigma 30mm F1.4 ART and it works great, quiet, fast, nice photos and EXPENSIVE. So I compare the Yongnuo 50mm F1.4 with it. A little over 1/3 the price of the Sigma, it has nice images, it's not quiet but it's pretty fast. It's focused where it's supposed to be. It's sharper than my old vintage Canon 50mm F1.8. So for the price I'm very happy with it.
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