Asahi/Pentax 55mm f1.8 "Zebra" Lens.
Thanks. I forgot to add that i did need to adjust the contrast in ACR. Also, a couple of them were obviously PP'd in PS. The only one i didn't touch was the low contrast shot of the building. I felt this had a nice film like quality from the sun directly to the right. So i left it as is.
Here is the lens used:
|AF4_2483 Surfing the Serengeti by DaveInHouston|
from Hot Air Balloon view
|Peregrine Falcon by Psychic1|
from Best Wildlife Photo of the Week - 4