Playing with my 50mm lens again today. I really love the flexibility it provides as far as depth of field, but with opportunity comes challenge. Today I experimented with very shallow depth of field.  It is quite the challenge to find that sweet spot, but oh how I love the effect of falling off focus!  f/1.8 was a bit too tight, so I stopped down a bit to 2.2.  The best results of both are below.

ISO 100, f/1.8, 1/200s, 50mm

f/2.2, ISO 100, 1/30s, 50mm