Use this on my S35 Sony FS5 for low light in combination with a Mitakon 50 0.95 and it's great. My only complaint is that at 0.95 it doesn't appear as bright as the Mitakon for some reason, but it's close. Also very sharp shooting wide open in 4K. In fact, I haven't figured out the steps in the photos yet. The smooth-running aperture ring is good, but makes it difficult to set the aperture, but it's a common feature of all these types of Chinese lenses. But for the price you can't go wrong, I use it a lot and it's great.
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