Specifications#
- Brand
- Nikon
- Model
- 1 Nikkor 18.5mm f/1.8
- Lens type
- Standard prime
- Focal length
- 18.5 mm
- Maximum aperture
- f/1.8
- Image circle
- 1-inch (13.2×8.8 mm)
- Mount(s)
- Nikon 1 (CX)
- Projection
- Rectilinear
- Lensfun correction profile
- Yes — distortion/vignetting/TCA
Equivalent focal length on different cameras#
Field of view and depth-of-field equivalence when this lens is used on bodies with different sensor sizes (natively or via an adapter).
| Camera format | At 18.5 mm | Equiv. aperture (DoF) |
|---|---|---|
| Full frame | 18 mm · 99° | f/1.8 |
| APS-C | 28 mm · 75° | f/2.7 |
| APS-C (Canon) | 30 mm · 72° | f/2.9 |
| Micro Four Thirds | 37 mm · 61° | f/3.6 |
Depth of field & background blur#
Computed on its native 1-inch format (CoC 11 µm). “Blur @2 m” is the size of an out-of-focus point at infinity, as a percentage of frame width, with the subject at 2 m — a simple bokeh index.
| Focal | Aperture | at 1 m | at 2 m | at 5 m | at 10 m | Hyperfocal | Blur @2 m |
|---|---|---|---|---|---|---|---|
| 18.5 mm | f/1.8 | 11.4 cm | 46.5 cm | 3.14 m | 17.3 m | 17.3 m | 0.7% |
| 18.5 mm | f/4 | 25.6 cm | 1.09 m | 10.9 m | ∞ | 7.80 m | 0.3% |
| 18.5 mm | f/8 | 53.9 cm | 2.75 m | ∞ | ∞ | 3.91 m | 0.2% |
Handheld & night-sky limits#
NPF assumes typical 20–24 MP sensors (≈6 µm pixels on full frame, ≈3.9 µm on APS-C, ≈3.3 µm on Micro Four Thirds).
| Body | Min. handheld shutter (longest focal) | 500 rule at 18.5 mm | NPF at 18.5 mm, f/1.8 |
|---|---|---|---|
| Full frame | 1/20 s | 27 s | 13 s |
| APS-C | 1/30 s | 18 s | 10 s |
| APS-C (Canon) | 1/30 s | 17 s | 9 s |
| Micro Four Thirds | 1/40 s | 14 s | 9 s |
Compatible cameras#
Bodies in our database with a native Nikon 1 (CX) mount.
- Nikon 1 J5 2015
- Nikon 1 V3 2014
- Nikon 1 S2 2014
- Nikon 1 J4 2014
- Nikon 1 AW1 2013
- Nikon 1 S1 2013
- Nikon 1 J3 2013
- Nikon 1 V2 2012
- Nikon 1 J2 2012
- Nikon 1 V1 2011
- Nikon 1 J1 2011
Frequently asked questions#
Is the Nikon 1 Nikkor 18.5mm f/1.8 full frame?
No — it is designed for 1-inch sensors.
What is the Nikon 1 Nikkor 18.5mm f/1.8 equivalent to on APS-C?
Its focal length is already the real value for 1-inch: 18.5 mm frames like 50 mm on full frame.
What is the Nikon 1 Nikkor 18.5mm f/1.8 good for?
As a standard prime it suits street, documentary, everyday and low-light shooting.
Sources & licences#
- Lensfun lens database — CC BY-SA 3.0
Last updated October 03, 2026 · How we calculate · Sources