Video: Quick review of the $550 Sainsonic Kamlan 55mm F1.2 lens

Photographer Christopher Frost recently got his hands on the Chinese-made, ultra-affordable Sainsonic Kamlan 55mm F1.2 lens and put it through its paces in a short review. At just $550, it's leaps and bounds more affordable than similar lenses by well-known brands, but as you might expect, those savings come at the cost of performance. It shouldn't come as a surprise to anybody that this manual-focus only lens is not optically on par with, say, the 50mm F1.2L USM from Canon, which retails for $1...