Quick answer
The Vivitar 400mm f/5.6 Auto Telephoto is a super telephoto telephoto lens covering 400mm at f/5.6 for the Pentax K mount. Its smaller maximum aperture favours daylight shooting and keeps the lens compact.
About this lens
This 400mm f/5.6 telephoto prime lens from Vivitar fits Pentax K mount cameras. It brings distant subjects closer for sports, wildlife and events.
Vivitar 400mm f/5.6 Auto Telephoto specifications
What can you shoot with the Vivitar 400mm f/5.6 Auto Telephoto?
At 400mm this is a super telephoto telephoto, 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 Vivitar 400mm f/5.6 Auto Telephoto use?
It uses the Pentax K mount, so it fits Pentax K cameras directly.
What is the focal length of the Vivitar 400mm f/5.6 Auto Telephoto?
It is a fixed 400mm lens with a maximum aperture of f/5.6. That makes it a super telephoto lens.
Is the Vivitar 400mm f/5.6 Auto Telephoto 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 Vivitar 400mm f/5.6 Auto Telephoto 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.
Which cameras does the Vivitar 400mm f/5.6 Auto Telephoto fit?
Any Pentax K-mount camera, including Pentax K-1, Pentax K-3, Pentax K-3 II, Pentax K-3 Mark III, and Pentax K-30 and 15 more.
Alternatives for Pentax K from other brands
All Pentax K lensesSame mount, overlapping focal range, closest maximum aperture first.
