Portrait / short tele prime · Four Thirds

Panasonic G 42.5mm f/1.7 Asph. Power OIS

The Panasonic G 42.5mm f/1.7 Asph. Power OIS is a four thirds prime lens (42.5 mm, f/1.7) for Micro Four Thirds. It belongs to the portrait / short tele prime class — ideal for head-and-shoulders portraits with flattering perspective and creamy backgrounds.

42.5 mmf/1.7Micro Four Thirds
42.5 mm
Focal length
f/1.7
Maximum aperture
29°
Diagonal angle of view (Four Thirds)
Four Thirds
Designed for

Specifications#

Model
G 42.5mm f/1.7 Asph. Power OIS
Lens type
Portrait / short tele prime
Focal length
42.5 mm
Maximum aperture
f/1.7
Image circle
Four Thirds (17.3×13 mm)
Projection
Rectilinear
Stabilisation
Yes (optical)
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 42.5 mmEquiv. aperture (DoF)
Micro Four Thirds85 mm · 29°f/3.4

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: 40 mm f/1.8 on four thirds.

FocalApertureat 1 mat 2 mat 5 mat 10 mHyperfocalBlur @2 m
42.5 mmf/1.72.7 cm11.1 cm70.4 cm2.87 m70.9 m3.1%
42.5 mmf/46.4 cm26.1 cm1.69 m7.43 m30.1 m1.3%
42.5 mmf/812.8 cm52.9 cm3.70 m23.5 m15.1 m0.7%

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 42.5 mmNPF at 42.5 mm, f/1.7
Micro Four Thirds1/80 s6 s4 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 Panasonic G 42.5mm f/1.7 Asph. Power OIS full frame?

No — it is designed for Four Thirds sensors.

What is the Panasonic G 42.5mm f/1.7 Asph. Power OIS equivalent to on APS-C?

Its focal length is already the real value for Four Thirds: 42.5 mm frames like 85 mm on full frame.

What is the Panasonic G 42.5mm f/1.7 Asph. Power OIS good for?

As a portrait / short tele prime it suits head-and-shoulders portraits with flattering perspective and creamy backgrounds.

Sources & licences#

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