I was able to capture this photograph of a bull elk in Yellowstone National Park.  It was taken with a Nikon D50 and a Sigma 50-500 mm lens.  I used a monopod for stability.  The camera specs are 1/640, f/6.3, 500mm, 1600 ISO.  It was taken in the early morning September 7, 2008.

Just inside the West Yellowstone Park entrance, we saw quite a few people parked on the side of the road.  We pulled in next to a small pond and on the other side were several elk grazing.

I have a larger image available of the Bull Elk in my gallery at The Lens Flare.

Tags: bull elk, elk, photography, wildlife, wildlife photography