Quick answer
The Laowa 4mm f/2.8 Fisheye MFT is a ultra-wide fisheye lens covering 4mm at f/2.8 for the Pentax K mount. Its bright maximum aperture handles indoor and evening light reasonably well.
About this lens
Laowa 4mm f/2.8 Fisheye MFT: a fisheye lens with a 4mm focal length and a maximum aperture of f/2.8, made for Pentax K mount cameras. It suits dramatic perspectives, astrophotography and creative wide-field work.
Laowa 4mm f/2.8 Fisheye MFT specifications
What can you shoot with the Laowa 4mm f/2.8 Fisheye MFT?
At 4mm this is a ultra-wide fisheye, which typically suits:
- Landscapes and big skies
- Architecture and interiors
- Astrophotography and night skies
Its bright maximum aperture handles indoor and evening light reasonably well.
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 | 4mm | 154.9° | 159.1° |
| APS-C | 1.5x | 6mm | 143.1° | 149° |
Frequently asked questions
What mount does the Laowa 4mm f/2.8 Fisheye MFT use?
It uses the Pentax K mount, so it fits Pentax K cameras directly.
What is the focal length of the Laowa 4mm f/2.8 Fisheye MFT?
It is a fixed 4mm lens with a maximum aperture of f/2.8. That makes it a ultra-wide lens.
Is the Laowa 4mm f/2.8 Fisheye MFT a prime or a zoom lens?
It is a prime lens with a fixed 4mm focal length. Primes usually open wider than zooms; this one opens to f/2.8.
What is the Laowa 4mm f/2.8 Fisheye MFT equivalent on a crop sensor?
On APS-C (1.5x crop) it frames like 6mm on full frame, with a 143.1° horizontal and 149° diagonal field of view. These figures are calculated from the focal length and crop factor.
Which cameras does the Laowa 4mm f/2.8 Fisheye MFT 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.
