Wide-angle prime · Four Thirds

Laowa 17mm f/1.8 C-Dreamer

The Laowa 17mm f/1.8 C-Dreamer is a four thirds prime lens (17 mm, f/1.8) for Micro Four Thirds. It belongs to the wide-angle prime class — ideal for street, environmental portraits, landscapes and astro.

17 mmf/1.8Micro Four Thirds
17 mm
Focal length
f/1.8
Maximum aperture
65°
Diagonal angle of view (Four Thirds)
Four Thirds
Designed for

Specifications#

Brand
Laowa
Model
17mm f/1.8 C-Dreamer
Lens type
Wide-angle prime
Focal length
17 mm
Maximum aperture
f/1.8
Image circle
Four Thirds (17.3×13 mm)
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 formatAt 17 mmEquiv. aperture (DoF)
Micro Four Thirds34 mm · 65°f/3.6

Depth of field & background blur#

Computed on its native Four Thirds format (CoC 15 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. Full table: 16 mm f/1.8 on four thirds.

FocalApertureat 1 mat 2 mat 5 mat 10 mHyperfocalBlur @2 m
17 mmf/1.818.5 cm76.8 cm5.95 m144 m10.7 m0.5%
17 mmf/442.6 cm1.98 m∞∞4.83 m0.2%
17 mmf/898.0 cm10.2 m∞∞2.42 m0.1%

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).

BodyMin. handheld shutter (longest focal)500 rule at 17 mmNPF at 17 mm, f/1.8
Micro Four Thirds1/30 s15 s10 s

Compatible cameras#

Bodies in our database with a native Micro Four Thirds mount.

Adapt it to other systems#

Sony E-mountNikon ZFujifilm X-mountCanon EF-MHasselblad XCDNikon 1 (CX)Pentax Q

Similar lenses#

Frequently asked questions#

Is the Laowa 17mm f/1.8 C-Dreamer full frame?

No — it is designed for Four Thirds sensors.

What is the Laowa 17mm f/1.8 C-Dreamer equivalent to on APS-C?

Its focal length is already the real value for Four Thirds: 17 mm frames like 34 mm on full frame.

What is the Laowa 17mm f/1.8 C-Dreamer good for?

As a wide-angle prime it suits street, environmental portraits, landscapes and astro.

Sources & licences#

Last updated October 03, 2026 · How we calculate · Sources