My first submission. This was taken in the Kruger National Park in the early morning. What I found interesting is that she was apart from the rest of her pride and was staring intently at something in the bush behind my car - totally unperturbed.
Camera: Canon EOS 40D
Lens: Canon 100 - 400mm
f/5.6
1/1250
ISO 400
Focal: 400mm
Minimal cropping; removed grass stalks from face area; reduced shadow on right hand side of face; reduced light reflection on leaves of bush in the background.
Composition is very good. LIke the subject placement. Exposure looks alright too.
From the brush in the background look like you had to deal with some harsh light conditions. If you can post your original image we can see what can be done to make it better.