Canon EF 24-105mm f4L IS USM Zoom Lens black.Lens Type: Standard zoom lens Mount: EF mount (compatible with Canon full-frame and APS-C DSLR cameras) Focal Length: 24-105mm Aperture: Maximum aperture of f/4 (constant aperture throughout the zoom range) Minimum Aperture: f/22 Autofocus: Ultra Sonic Motor (USM) for fast, silent, and accurate autofocus Image Stabilization: Yes (up to 4 stops of image stabilization) Minimum Focus Distance: 0.45m (1.48 ft) Construction: 17 elements in 12 groups Filter