The Canon EF 24-105mm f/4L IS II USM is a versatile lens designed for full-frame cameras. Let’s dive into its features:

1. Focal Length and Aperture:

   • It covers a zoom range of 24–105mm.
   • The constant f/4 aperture ensures consistent performance across the zoom range.

2. Optical Design and Image Quality:

   • The lens features an all-new optical design with improvements in peripheral brightness.
   • Air Sphere Coating (ASC) minimizes flare and ghosting.
   • A 10-blade circular aperture delivers beautiful, soft backgrounds.
   • Fluorine coating on lens surfaces reduces smears and fingerprints.

3. Image Stabilization:

   • The improved IS system provides up to 4 stops of shake correction.
   • This stabilization is especially useful for handheld shooting in challenging lighting conditions.

4. Durability and Performance:

   • The lens is sealed against dust and moisture, making it reliable even in harsh environments.
   • It’s suitable for a wide range of photography, including landscapes, portraits, and sports.

5. Technical Specifications:

   • Focal Length & Maximum Aperture: 24-105mm f/4
   • Lens Construction: 17 elements in 12 groups
   • Diagonal Angle of View: 84°00’ - 23°20’
   • Closest Focusing Distance: 1.5 ft. / 0.45m
   • Filter Size: 77mm diameter
   • Dimensions: φ3.3 x 4.7 in., approx. 28.04 oz. / φ83.5 x 118mm, approx. 795g