With an STM (stepping motor) and focus mechanism, this Canon EF-S 9519B002 zoom lens allows you to record ultrasharp videos or capture crisp photos using your compatible Canon camera. The UD lens element helps you take highly realistic images.
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This was my first wide angle lens. The focus motor is really nice (STM) you can get really creative within the 10-18mm range. It will add a lot to your photography. The lens is very small and light, which is a plus. Image quality is very good. my only concern is the plastic mount. But from what I've read it is not a issue, even in the long-term. If you have a limited budget, like I had, this may be the lens you want to get. I rarely use a telephoto ( don't do portraits, or macro work) I use this lens and the kit 18-55 (non stm, was cheaper, but works well) Believe it ,or not the kit lens also has verygood image quality.
What's great about it: stm focus is smooth as silk, 10-18mm range, cost