Quick answer
The Canon EF 500mm f/4L IS II USM + EF 1.4x extender III is a super telephoto prime lens covering 500mm at f/500.0 for the Canon EF mount. Its smaller maximum aperture favours daylight shooting and keeps the lens compact.
About this lens
Canon EF 500mm f/4L IS II USM + EF 1.4x extender III: a telephoto prime lens with a 500mm focal length and a maximum aperture of f/4, made for Canon EF mount cameras, from the Canon L series with Image Stabilizer and ultrasonic-motor autofocus. A professional super-telephoto L-series lens, a fixture on sidelines and at wildlife hides.
Canon EF 500mm f/4L IS II USM + EF 1.4x extender III specifications
What can you shoot with the Canon EF 500mm f/4L IS II USM + EF 1.4x extender III?
At 500mm this is a super telephoto prime, which typically suits:
- Wildlife and birds
- Motorsport and field sports
- Distant subjects and the moon
Its smaller maximum aperture favours daylight shooting and keeps the lens compact.
Full-frame equivalent and field of view
Calculated from the focal length and crop factor. Not measured.
| Sensor | Crop | Equivalent | Horizontal FOV | Diagonal FOV |
|---|---|---|---|---|
| Full frame | 1.0x | 500mm | 4.1° | 5° |
| APS-C | 1.6x | 800mm | 2.6° | 3.1° |
Frequently asked questions
What mount does the Canon EF 500mm f/4L IS II USM + EF 1.4x extender III use?
It uses the Canon EF mount, so it fits Canon EF cameras directly.
What is the focal length of the Canon EF 500mm f/4L IS II USM + EF 1.4x extender III?
It is a fixed 500mm lens with a maximum aperture of f/500.0. That makes it a super telephoto lens.
Is the Canon EF 500mm f/4L IS II USM + EF 1.4x extender III a prime or a zoom lens?
It is a prime lens with a fixed 500mm focal length. Primes usually open wider than zooms; this one opens to f/500.0.
What is the Canon EF 500mm f/4L IS II USM + EF 1.4x extender III equivalent on a crop sensor?
On APS-C (1.6x crop) it frames like 800mm on full frame, with a 2.6° horizontal and 3.1° diagonal field of view. These figures are calculated from the focal length and crop factor.
Which cameras does the Canon EF 500mm f/4L IS II USM + EF 1.4x extender III fit?
Any Canon EF-mount camera, including Canon EOS 1D X, Canon EOS 5D, Canon EOS 5D Mark II, Canon EOS 5D Mark III, and Canon EOS 5D Mark IV and 7 more.
Alternatives for Canon EF from other brands
All Canon EF lensesSame mount, overlapping focal range, closest maximum aperture first.
