You can't go wrong with this lens. Because I am not a professional photographer who gets paid to shoot, my budget is limited. This lens is one of the least expensive, quality lenses that could find. The result will surprise you.This lens is now my favorite when shooting portraits. Because of its wide aperture, you can really blur the background, even indoors. It's great for low-light shots for the same reason (wide-aperture).I highly recommend this lens to all amateur photographers as their first prime lens. Some people compare this lens with the more expensive lenses but I don't think you can compare apples with oranges because this lens is not in the same price range as other lenses. 

Question: What is build quality on lenses?
Answer: lenses that could find