Nikon Nikkor AI 20mm f/4
The Nikon 20mm f/4 is a 20mm f/4 lens designed for Nikon F mount cameras. Used copies start from $150.96 on GearFocus, with buyer protection on every purchase.
Nikon Nikkor AI 20mm f/4
Used Nikon 20mm f/4 Listings on GearFocus
Lens Overview — Nikon 20mm f/4
Key Features — Nikon 20mm f/4
20mm Full-Frame Prime: Fixed 20mm focal length covers a full-frame image circle, usable on both full-frame and APS-C Nikon F-mount bodies without vignetting.
f/4 Maximum Aperture: Wide-angle shooting at f/4 provides a usable depth of field across the frame, suited to landscapes and architecture.
Nikon AI Interface: Mechanical aperture indexing communicates exposure data to compatible Nikon bodies, enabling metered shooting without electronic contacts.
Nikon F Mount: Compatible with a wide range of Nikon DSLR bodies, from vintage film SLRs to modern full-frame and crop-sensor DSLRs.
Manual Focus Only: Hands-on focus ring gives photographers precise, deliberate control with no autofocus motor to rely on.
Lightweight Build: At 230g, this is a compact and portable wide-angle prime that adds minimal weight to a travel or street kit.
Lens Specifications — Nikon 20mm f/4
| Spec | Detail |
|---|---|
| Use Cases | Landscape, Architecture, Travel, Street |
| Lens Type | Wide-Angle |
| Format | Full Frame |
| Zoom/Prime | Prime |
| Focal Length | 20mm |
| Maximum Aperture | f/4 |
| Camera System | DSLR |
| Lens Mount | Nikon F |
| Autofocus | No |
| Focus Type | Manual |
| Image Stabilization | None |
| Filter Thread | 52mm |
Description — Nikon 20mm f/4
The Nikon Nikkor AI 20mm f/4 is a prime wide-angle lens built for the Nikon F mount, with full-frame coverage that ensures compatibility with Nikon's larger sensor DSLR bodies. At a fixed focal length of 20mm and a maximum aperture of f/4, it offers a broad wide-angle field of view suited to a variety of photographic applications. The manual focus only operation puts full focusing control in the photographer's hands, without any autofocus motor.
At just 230g, this lens is impressively light for a full-frame wide-angle prime, reducing fatigue during extended shoots or travel. The 52mm filter thread keeps accessory options plentiful and budget-friendly. With no image stabilization, users should be mindful of shutter speed when shooting handheld.
As an AI-indexed Nikon F-mount lens, it integrates with compatible Nikon bodies for metered exposure control.
Pros — Nikon 20mm f/4
- ✓Lightweight at just 230g, making it highly portable for a full-frame wide-angle prime
- ✓Full-frame coverage on the Nikon F mount means no crop-related limitations on larger sensor bodies
- ✓52mm filter thread size is widely available and affordable, keeping accessory costs low
Cons — Nikon 20mm f/4
- ✗Maximum aperture of f/4 limits light-gathering ability in lower-light shooting situations
- ✗Manual focus only — no autofocus support for any shooting scenario
- ✗No image stabilization, which combined with f/4 maximum aperture can make handheld shooting in dim conditions challenging
Frequently Asked Questions — Nikon 20mm f/4
What camera mount does this lens use?+
The Nikon Nikkor AI 20mm f/4 uses the Nikon F mount. It is designed for Nikon F-mount DSLR cameras.
Does this lens support autofocus?+
No, this lens is manual focus only. There is no autofocus mechanism, so focusing must be done by hand.
Will this lens work on a full-frame Nikon body?+
Yes, the lens is specified as a full-frame format lens, meaning it is designed to cover a full-frame sensor without vignetting.
What filter size does the Nikon Nikkor AI 20mm f/4 accept?+
The lens has a 52mm filter thread, which is a widely available and commonly affordable size for polarizers, ND filters, and other accessories.
Does this lens have image stabilization?+
No, the specifications confirm that image stabilization is not present on this lens.
How heavy is this lens?+
The Nikon Nikkor AI 20mm f/4 weighs 230g, making it a compact and lightweight option for a full-frame wide-angle prime.