Sigma 15mm F1.4 DG DN Diagonal Fisheye Art Lens for Sony E

The Sigma 15mm F1.4 DG DN Diagonal Fisheye Art for Sony E is a full-frame fisheye that sees 180 degrees across the diagonal. Sigma launched it in 2024 as the first F1.4 diagonal fisheye for full frame. On an a7 IV, a7C II or a7R V it is aimed at the night sky, immersive landscapes, skate and action shots, and creative interiors.

A 180 degree view As a diagonal fisheye it fills the whole rectangular frame, with no black circle, and bends straight lines for that distinctive curved look. It can also be defished in software when you want a wide rectilinear result.

Bright enough for the stars At F1.4 it collects four times the light of an F2.8 fisheye. Sigma corrected sagittal coma flare for astrophotography, and a lens heater retainer holds a dew strap in place.

Optical design There are 21 elements in 15 groups, including four FLD, three SLD and two aspherical elements. HLA linear motor autofocus is fast and quiet.

Handling

It has an aperture ring with a lock and a click switch, an assignable AFL button, a manual focus lock switch and a detachable Arca-Swiss compatible tripod socket. The hood is built in, and sheet filters fit a rear holder.

Who it's for

This is for astro, landscape and action photographers who want the widest possible view. If you want a straight-line ultra-wide instead, the Sigma 14mm F1.4 DG DN is the rectilinear choice. Note that this is a different lens from the Sigma 15mm F1.4 DC, which is a standard wide prime for APS-C cameras.