What's one to do when you buy a new lens (discounted $300 by the way)? Thats right, go shoot some birds at one of the many Colorado State Parks. Lucky for us, Barr Lake is just a few minute drive for us. We got up at 5am thinking that we would roll out of bed and hit the road. Well, that didn't happen. We got on the road at 6am and arrived a few minutes later. Our new lenses added an additional 3lbs to our backpacks and along with the tripod and water bottles it was a wonder we could walk at all. Our goal was to go out to the Gazebo. Michelle thought it was a short walk (with a 15lb backpack in tow) but it was about 1 1/2 miles. Normally, this would be about 30 minute walk but a ton of birds everywhere it took us about an hour or so to reach our destination. How big are our lenses?