Please disregard this picture.In my zeal I didn't look closely at the instructions.This picture was taken along the Potomac River in Washington, DC. I used a Canon 100mm prime 2.8 L IS on a Canon 7D. I committed a sin with this picture. I cropped it slightly. I have a Canon 70 - 200mm 2.8 L IS lens and could have used that. I justify my sin to myself. The 100mm prime is a much better lens for what I was doing. I didn't need the totality of the 70-200mm. I knew I was going to be working in the 100-150mm range. The Canon 100mm 2.8 L IS macro is a versatile sweet lens, my favorite lens and a must have. It's light and fast. The 7D shoots at around 8fps and crops at 1.6. I can fire off fast shots with the lens opened up. The crop factor from the 7D brings me into the action. Hand holding the camera gave me the flexibility I needed for quick compositional changes that are indicative of wildlife photography. The Canon 70-200mm 2.8 L IS lens is a great lens but heavy and cumbersome. Don't get me wrong, I wouldn't exchange my 70-200mm for anything. At the same time, If I can get away with using the 100mm prime with a slight crop, I prefer it.