10mm f/2.8 EX DC HSM Fisheye

10mm
f/2.8
Fisheye

Quick answer

The Sigma 10mm f/2.8 EX DC HSM Fisheye is a ultra-wide fisheye lens covering 10mm at f/2.8 for the Pentax K mount. Its bright maximum aperture handles indoor and evening light reasonably well.

About this lens

The Sigma 10mm f/2.8 EX DC HSM Fisheye is an APS-C fisheye lens covering 10mm at f/2.8 for Pentax K mount cameras, with Hyper Sonic Motor autofocus. It suits dramatic perspectives, astrophotography and creative wide-field work.

Sigma 10mm f/2.8 EX DC HSM Fisheye specifications

Brand: Sigma
Mount: Pentax K
Focal length: 10mm
Maximum aperture: f/2.8
Lens type: Fisheye

What can you shoot with the Sigma 10mm f/2.8 EX DC HSM Fisheye?

At 10mm 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	10mm	121.9°	130.4°
APS-C	1.5x	15mm	100.4°	110.5°

Try the field-of-view calculator

Frequently asked questions

What mount does the Sigma 10mm f/2.8 EX DC HSM Fisheye use?

It uses the Pentax K mount, so it fits Pentax K cameras directly.

What is the focal length of the Sigma 10mm f/2.8 EX DC HSM Fisheye?

It is a fixed 10mm lens with a maximum aperture of f/2.8. That makes it a ultra-wide lens.

Is the Sigma 10mm f/2.8 EX DC HSM Fisheye a prime or a zoom lens?

It is a prime lens with a fixed 10mm focal length. Primes usually open wider than zooms; this one opens to f/2.8.

What is the Sigma 10mm f/2.8 EX DC HSM Fisheye equivalent on a crop sensor?

On APS-C (1.5x crop) it frames like 15mm on full frame, with a 100.4° horizontal and 110.5° diagonal field of view. These figures are calculated from the focal length and crop factor.