I have used a few variations of each type of lens, I have two of them on my desk now. My favorites are the 50/1.8, and the 50/1.2. The 50/1.8 is my favorite "all-around" lens, I use the 55/1.2 for shooting wide open at near subjects. The 55/1.2 gives dreamy results when shooting flowers, plants, or insects.