Venus Laowa 4mm F2.8 Fisheye

Focal length: 4 mm
Aperture: f/2.8
Weight: 135 g
Filter diameter: –
Min. focus distance: 8 cm
Length: 25.5 mm

At a Glance

A compact fisheye for APS-C on L-Mount, the 4 mm focal length corresponds to 6 mm on full frame. It delivers a very wide view with curved lines and an aperture of f/2.8. It weighs 135 g and is focused manually, down to 8 cm. It can be used for creative work, action and travel.

Good for

Creative
Action
Travel

Worth knowing

APS-C image circle: on full-frame cameras only usable in crop mode, at reduced resolution.
Fisheye projection: straight lines away from the center are rendered curved.

Derived from the manufacturer data, not from our own tests. How we check

Technical Specifications

Min. focal length: 4 mm
Max. focal length: 4 mm
Max. aperture (min. zoom): f/2.8
Max. aperture (max. zoom): f/2.8
Min. aperture: f/16
Elements: 7
Groups: 6
Weight: 135 g (0.3 lb)
Filter diameter: –
Min. focus distance: 8 cm (3.15 in)
Max. magnification: 1:9.1 (0.11×)
Length: 25.5 mm (1 in)
Diameter: 45.2 mm (1.78 in)

Manufacturer data: venuslens.net

Last checked: October 13, 2026 (against the manufacturer data) · How we check

Simulate depth of field and angle of view

Compare with other lenses

Which cameras does the Venus Laowa 4mm F2.8 Fisheye fit?

The Venus Laowa 4mm F2.8 Fisheye is designed for APS-C sensors. On APS-C L-Mount cameras its field of view equals 6 mm in full-frame terms. Full-frame bodies use it in APS-C (crop) mode, recording only part of the sensor and fewer megapixels.

L-Mount cameras

Full frame (in APS-C mode):: Leica SL3-P,Leica SL3-S,Sigma BF,Panasonic Lumix S1II,Panasonic Lumix S1IIE,Panasonic Lumix S1RII,Leica SL3,Panasonic Lumix S9,Blackmagic PYXIS 6K,Panasonic Lumix S5II,Panasonic Lumix S5IIX,Blackmagic Cinema Camera 6K,Panasonic Lumix BS1H,Leica SL2-S,Panasonic Lumix S5,Sigma fp L,Leica SL2,Panasonic Lumix S1,Panasonic Lumix S1R,Panasonic Lumix S1H,Sigma fp,Leica SL (Typ 601)
APS-C:: Leica CL,Leica TL2,Leica TL,Leica T (Typ 701)