Super-wide Sigma 15mm F1.4 DG DN Diagonal Fisheye lens aims for the stars!

Sigma 15mm F1.4 DG DN Diagonal Fisheye
(Image credit: Sigma)

Sigma claims this is the world’s first f/1.4 diagonal fisheye, the unique feature here being its f/1.4 maximum aperture. This alone would make it a very interesting option for astrophotography, where extreme angles of view and extreme lens apertures are highly desired, but Sigma has built in a number of other features to tempt stargazers too.

The Sigma 15mm F1.4 DG DN is a so-called ‘diagonal fisheye’, which means that while there is strong curvature towards the edges of the frame, the image does still fill the frame – as opposed to a ‘circular fisheye’, where you just get a circular image with black borders.

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Rod Lawton

Rod is an independent photography journalist and editor, and a long-standing Digital Camera World contributor, having previously worked as DCW's Group Reviews editor. Before that he has been technique editor on N-Photo, Head of Testing for the photography division and Camera Channel editor on TechRadar, as well as contributing to many other publications. He has been writing about photography technique, photo editing and digital cameras since they first appeared, and before that began his career writing about film photography. He has used and reviewed practically every interchangeable lens camera launched in the past 20 years, from entry-level DSLRs to medium format cameras, together with lenses, tripods, gimbals, light meters, camera bags and more. Rod has his own camera gear blog at but also writes about photo-editing applications and techniques at