Full Frame Advantage

Here are a couple of the first shots from my first FF sensor.   The first one is around 25mm, which is close to what an image taken with this lens would look like if taken at 17mm on a cropped frame sensor.  The second is the same shot, but at a true 17mm on a FF sensor. 25mm on full frame is close to 17mm on cropped sensor

17mm on a full frame.

This is the reason that only the lens that I sold with my 7D was an EF-S mount - all of my remaining lenses are standard lenses.