Not shatter necessarily, but the L could certainly take a bump or a drop a lot better than a Tamron could. The Tamron is built mostly of plastic whereas the L lens is mostly metal. The L lenses zoom ring works very smoothly, the focus motor is faster and quieter. The glass is ground to higher tolerances. Special glass or other materials for elements are used. All of this costs money. And for me it's worth the money.Originally Posted by redonnemoi
You sound very skeptical that there should be any difference between an expensive lens or a cheap lens. Let me tell you that you are wrong, that there is a difference in build or image quality and in most cases both. The lens is what gets the image to the sensor and a good lens can make all of the difference in getting a good photo or a great photo with the photographer being equal.
I have learned this from 30+ years of taking photographs, I started with inexpensive stuff and after I purchased my first pro grade lens I realized that is where it's at. Experiment, buy the cheap stuff, if you progress at all in photography you'll find I am right. The good glass is worth it. It's like buying a fine automobile vs. buying an economy model. They both do the job, and get you from a to b, but you'll certainly have a more comfortable nicer ride aboard the fine auto.