The Canon EF 100-400mm f/4.5-5.6L IS USM is a legendary professional telephoto zoom lens designed for reach, versatility, and high-contrast imaging.
| Focal Length | 100-400mm |
| Maximum Aperture | f/4.5 - 5.6 |
| Minimum Aperture | f/32 - 38 |
| Lens Mount | Canon EF |
| Minimum Focus Distance | 5.9 ft / 1.8m |
| Filter Thread Size | 77mm |
| Weight | 3.04 lbs / 1380g |
| Diaphragm Blades | 8, rounded |
Yes, as a Canon L-series lens, it features professional-grade dust and moisture resistance, making it suitable for use in challenging outdoor weather conditions.
Yes, it can be used on Canon EOS R series cameras with an EF-EOS R adapter and on Sony Alpha cameras using a Metabones or Sigma MC-11 adapter with full autofocus support.
This version (Mark I) uses a push-pull zoom mechanism and older IS technology, whereas the Mark II uses a traditional twist-zoom and offers up to 4 stops of stabilization.