Instruct: Classify a given Amazon review as either positive or negative.
Query: Hobbiest and photographer

I am not going to write a lengthy review. All I have to say is that the quality of my pictures went from one to 100. The kit lens 15-85 is an ok lens. The Canon 24-105mm f/4 USM Lens produces very sharp images. If you really know how to use light you don't need the extra 2.8 aperture. I've taken very soft and clear portraits already and this is the lens that will stay on my camera unless I want to do some serious Macro with my Canon Macro 100mm L USM Lens or some really tight portraits. If you're struggle ling between the 24-105 and the 24-70, just get the 105. You will have the extra zoom and the IS and that is a big plus. Just learn how to use your internal and external, flash, and available light and you will get amazing portraits or pictures overall.