of using the 20mm for head and shoulders shots.
It is too short and renders and unatractive perpective.
You many have been trying to get that effect but most models would not apprediate it.
I don't think that you can get closer than waist up portriats with 20mm on u 4/3.
For shots like the last one of a group, it works great. Even the UPS man is fine, but you are begining to see some distortions due to its shorter than normal forcal lenght.
Tedolph