electromagnetism - Magnetic field of a solenoid at the poles?

It's known that at the center of an electromagnet/solenoid the magnetic field $B$ is strongest there. At the pole/edge of the solenoid/ or electromagnet is the magnetic field $B$ strong? Let's assume $B$ = $1$ $Tesla$ at the center, how different is $B$ at the edges?

_{(source: gsu.edu)}

In general, is it simple to create a $1$ $Tesla$ magnetic field or higher? MRI's use field's above $4$ $Tesla$ yet it seems very complex and requires massive power & cooling.