The EF 24-105mm f/3.5-5.6 IS STM lens is the first Canon EF standard zoom lens for full-frame sensor cameras to include a lead screw-type stepping motor (STM) for smooth and quiet AF and tracking while shooting movies or still images. It offers top-notch image quality thanks to two aspheric lenses and a UD lens for sharpness and clarity; optimized lens placement and advanced coatings that reduce ghosting and flare while delivering remarkable color balance; and a 7-blade circular aperture diaphragm that creates gorgeous, soft backgrounds. The lens is compact, has an advanced image stabilization system for up to four stops of compensation, and offers full time manual focus. With full-frame compatibility, outstanding STM AF performance, and covering a popular zoom range, the EF 24-105mm f/3.5-5.6 IS STM is an excellent choice.
Offering the quiet and smooth autofocusing benefits of a stepping motor for full-frame EOS DSLRs, Canon's EF 24-105mm f/3.5-5.6 IS STM Lens is a standard telephoto supporting the use of the Movie Servo AF mode. Complementing the focusing precision is an equally apt Optical Image Stabilizer, which helps to minimize the appearance of camera shake by four shutter speed stops to benefit working with slower shutter speeds or longer focal length positions. This wide-angle to telephoto zoom lens is designed as a useful option for everyday shooting, and champions working in difficult lighting conditions for both photo and video applications.
With regard to the optical design, this lens incorporates two aspherical elements and one UD element to reduce chromatic aberrations throughout the zoom range and benefit overall image sharpness and clarity. Furthermore, optimized coatings have also been applied to individual elements to suppress surface reflections for contrast-rich, color-neutral imaging.
The lens is also designed around a seven-group zoom optical system, along with an inner-focusing mechanism to quicken focusing times. Additionally, a seven-blade rounded diaphragm is employed to produce a smooth out-of-focus quality beneficial to selective focus imagery.