This is project 'overkill'. This is the setup for those who might feel a bit inadequate with their camera body and need to throw on some type of intimidation factor. LOL. The Sigma looks huge on the Canon T2i and there's a battery pack on. Imagine what it would look like without. Someone wanted to see what this would look like, it's crazy. It's so forward heavy, I wouldn't be able to shoot with this thing if it were on the T2i. It does take some awesome photos with great range http://cheesycam.com/sigma-50-500mm-quick-test/

Sigma 50-500mm f/4.5-6.3 DG OS HSM APO Autofocus Lens

Update on the Sigma and Canon Lens
I screwed up big time talking about reviewing the Sigma 50-500mm vs. the Canon 100-400mm. The Sigma is in a different class, and I was confused by the price. They both sit around the $1600 dollar range. In fact the lens that I really should be comparing to the Canon 100-400mm is the Sigma 120-400mm F/4.5-5.6 that has the same aperture range and costs only $900 dollars. I'll see if I can return this Sigma 50-500mm and review the other. It won't be anytime soon though, so for now i'm not going to do Lens vs. Lens, i'll just review them seperately. I did get to shoot with the Canon 100-400mm on the 5D Mark II and is there such a thing as 'love at first click?'. I'm blown away by this lens on how fast and sharp it is. The colors and contrast that come from a lens with this range is amazing. The optical stabilization works awesome, I was able to do some handheld video at 400mm with decent results. Imagine if I had a Tripod. Next article post will be around the Canon 100-400mm F/4.5-5.6.

Canon Zoom Telephoto EF 100-400mm f/4.5-5.6L IS (Image Stabilizer) USM Autofocus Lens