Camera Upgrade

[aaron1956]

I currently own a Canon 400D I purchased in England a few years ago. The same thing as the Rebel XTi. I am wanting to upgrade to the EOS 5D Mark II. Will I see a big difference in picture quality switching to a full frame camera? The lenses I have are:
Canon 100mm EF USM f2.8
Sigma DG 28-300mm f3.5-6.3
Tamron AF 28-105mm f4-5.6 if (I bought at pawnshop for 20 bucks and use it more than the others!)
Canon EFS 18-55 mm (came with 400D)

 

[KmH]

A big difference? No. The knowledge and skill of the photographer has a bigger impact on image quality than upgrading a camera body..

Your EF-S 18-55 won't mount on the 5D Mk II