Sigma 20mm f/1.8 EX D DG Aspherical Autofocus Lens for Nikon Review
Live prices and creator coverage for the Sigma 20mm f/1.8 EX D DG Aspherical Autofocus Lens for Nikon - everything in one place.

Our editorial take on the Sigma 20mm f/1.8 EX D DG Aspherical Autofocus Lens for Nikon
The Sigma 20mm f/1.8 EX DG is an older ultra-wide prime for Nikon F-mount DSLRs, offering a fast aperture and aspherical optics in a compact package. Designed for full-frame cameras, it delivers a wide field of view ideal for landscapes, architecture, and environmental portraiture. At its used price point around $162, it presents an affordable entry into fast wide-angle shooting for DX and FX Nikon bodies.
This lens predates Sigma's Art series and reflects the EX line's more modest build quality and optical performance. The f/1.8 maximum aperture provides shallow depth-of-field control and low-light capability rare in ultra-wides, though expect some vignetting and distortion at the edges, typical for fast wide primes of this generation. Autofocus is driven by a built-in motor, so compatibility and speed will vary by camera body. The 82mm filter thread is large for a 20mm lens, adding bulk and cost to filter systems.
For budget-conscious Nikon shooters seeking an ultra-wide with a fast aperture, the Sigma 20mm f/1.8 EX DG fills a niche, especially on the used market. It's best suited to careful shooters who can work around legacy optical quirks and don't need the sharpness or weather sealing of modern alternatives.
- Fast f/1.8 aperture for an ultra-wide prime
- Affordable used pricing for full-frame Nikon shooters
- Compact and lightweight for a fast 20mm lens
- Older EX-series optics show vignetting and edge distortion
- Large 82mm filter thread adds bulk and expense
Synthesized by Geared editors from early expert reviews.
Community ratings
Tap a star. That's it. Save the words for the comments below.
0 ratings
Comments
Ask questions, share your experience, reply to other owners.
No comments yet. Start the conversation.
About this product
The Sigma 20mm f/1.8 EX DG is a wide-angle prime lens for Nikon F-mount cameras with aspherical elements and autofocus. It fits landscape, architectural, and astrophotography shooters who need a fast, affordable ultra-wide option.
Specs
- Legacy
- false
- Condition Grades Seen
- ex
- Keh Merchant Product Id
- 357473-1805596
Where to buy
Live prices from retailers. We earn a small commission when you click through - never affects ranking.
- KEHused● In stockBest price$162Buy












