I bought a secondhand Canon Rebel 300D, with it came
various lenses, 50mm-1.8 & 28-135 & a 18-55, and a 75-300
there is nothing else on the lens to say if its USM or IS
I'm not sure if this lens is really what I should have, I was advised before I started buying a camera and lens I should have a 28-135 and a 70-300.
My question is should I be looking to sell the 75-300 and buy a 70-300.

My hobby I hope is going to be directed to Wildlife and Full size Aircraft at Shows, with the odd family shots.