Quick answer
The Sigma 400mm f/5.6 APO Macro is a super telephoto macro lens covering 400mm at f/5.6 for the Sigma SA mount. Its smaller maximum aperture favours daylight shooting and keeps the lens compact.
About this lens
A 400mm f/5.6 macro lens, the Sigma 400mm f/5.6 APO Macro is designed for Sigma SA mount bodies, with apochromatic correction. It is intended for close-up work with small subjects such as flowers and insects.
Sigma 400mm f/5.6 APO Macro specifications
What can you shoot with the Sigma 400mm f/5.6 APO Macro?
At 400mm this is a super telephoto macro, 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 | 400mm | 5.2° | 6.2° |
| APS-C | 1.5x | 600mm | 3.4° | 4.1° |
Frequently asked questions
What mount does the Sigma 400mm f/5.6 APO Macro use?
It uses the Sigma SA mount, so it fits Sigma SA cameras directly.
What is the focal length of the Sigma 400mm f/5.6 APO Macro?
It is a fixed 400mm lens with a maximum aperture of f/5.6. That makes it a super telephoto lens.
Is the Sigma 400mm f/5.6 APO Macro a prime or a zoom lens?
It is a prime lens with a fixed 400mm focal length. Primes usually open wider than zooms; this one opens to f/5.6.
What is the Sigma 400mm f/5.6 APO Macro equivalent on a crop sensor?
On APS-C (1.5x crop) it frames like 600mm on full frame, with a 3.4° horizontal and 4.1° diagonal field of view. These figures are calculated from the focal length and crop factor.
