Panasonic Lumix S 40mm F2 - Lens review and specs

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Leica L Prime full-frame 2026

Weather Sealed

Autofocus

Breathing Correction

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40mm

Focal length

f/2

Max aperture

144 g

Weight

14mm35mm85mm200mm600mm

▲ 40mm

Max aperture

f/1.4

f/2

f/4

Constant Aperture

Aperturef/2

f/2f/22

Near focus6' 7"

Far focus7' 8"

Total DOF1' 1"

Hyperfocal91' 2"

Subject distance7' 1"

Focal length40 mm

Aperturef/2

SensorFull Frame

Illustrative scene preview based on this lens's focal length, aperture, and sensor coverage.

This preview uses 40mm, f/2, and Full Frame. Subject distance is estimated to keep lens previews comparable.

Min aperture: f/22
Diaphragm blades: 7

Optics

Optical construction: 7 elements in 6 groups
Special elements: 3 aspherical lenses
Coatings: Fluorine coating

Focusing

Minimum focus: 30 cm
Max magnification: 0.17×
AF motor: Stepper motor

Physical

Weight: 144 g
Dimensions: ⌀69.4mm × 40.9mm
Filter thread: 62 mm
Color: Black, silver

Handling & Controls

Custom Buttons: 1

Recommended Use

Ideal for: Landscapes, Portraits, Street, Travel, Walkaround / Daily, Weddings

Release year: 2026
Announced: Apr 21, 2026
Approx price: $399.99 USD

The best

Ultra-portable F2 prime for L-mount

Also

Hybrid-optimized with AF/MF switch

Summary

The Panasonic LUMIX S 40mm F2 (S-S40) is a compact and lightweight full-frame prime lens designed for the L-Mount system. Weighing just 144g and measuring 40.9mm in length, it is specifically engineered to complement slim bodies like the LUMIX S9. Its versatile 40mm focal length offers a natural field of view, making it an excellent choice for street photography, environmental portraits, and daily documentation.

The optical construction consists of 7 elements in 6 groups, including three aspherical lenses to ensure high-resolution performance and minimal aberrations. Despite its pancake-style proportions, it features a dedicated AF/MF switch and a customizable focus button on the barrel. The lens utilizes a fast and quiet stepping motor for internal focusing, and it is fully optimized for video with suppressed focus breathing and micro-step aperture control for smooth exposure transitions.

Built for the outdoors, the 40mm F2 is dust and splash resistant and can operate in temperatures as low as -10°C. It features a 62mm filter thread—matching the Lumix S 18-40mm for easy filter swapping— and a 30cm minimum focus distance. With its bright F2 aperture and portable design, it provides L-mount users with a high-quality, affordable 'nifty-forty' that balances perfectly on modern mirrorless cameras.