The Canon 50mm 1.8 has been around for a long time, and is well known as being one of the cheapest (in cost) lenses you can get, and it offers a tremendous ability for letting light into the camera and capturing a very shallow depth of field. An even cheaper 50mm hit the market recently, and Photographer Tony Northrup did a few tests to compare the two.
Tony and Chelsea compare autofocus, chromatic aberration, vignetting, and bokeh in their tests, which do reveal some noticeable differences.
The Yonguo 50mm is only available from China at the moment, so you’ll have to head over to Ebay to check those out. There is a pre-order available on B&H, but the cost is much closer to that of the Canon 50mm, which is currently listed at
Tony has a lot of other helpful videos on photography available for free on his YouTube channel.