Attentive Quarter Horse Picture

A short whistle brought this quarter horse to full attention. A 500mm lens at f/4 on a 1.3x body creates a nice green blur out of the pasture background.
 

Picture Specs & Equipment Reviews

500mm  f/4.0  1/1250  ISO 500     Size: 3888W x 2592H  
 
Canon EOS 1D Mark III  
Canon EF 500mm f/4.0 L IS USM Lens