Review on Black Canon EF 24-105mm f/4L IS II USM Lens - Model 1380C002 by Stanislaw Bieroza ᠌

The "red ring" and the letter "L" on the lens speak for itself, yet even so: 1) The lenses' build quality. even at f/4 is quite crisp, and f/8 to f/16 is often superb. 2) A wide focus length range. Although there is no "barrel" effect, the image looks good on Fullframe and rather broad on the near end on Crop. Three) Stabilizer. When filming video, it performs admirably and pulls even 1/5. 4) Aperture maintained at f/4 across the whole focal range. 5) An ultrasound motor. It focuses rapidly even on inexpensive versions, like the 600D, and works flawlessly with the 7D. a mostly metal body, but not entirely, a rubber gasket on the mount, a sizable focus ring, and huge overall proportions.