Voigtländer 40 mm F2.0 SEPTON Aspherical E-Mount – Compact Full-Frame Lens for Sony

A legendary optical design reimagined

The Voigtländer SEPTON 40 mm F2.0 Aspherical for Sony E-Mount draws inspiration from a historic Voigtländer lens originally developed in the late 1950s and 1960s for the Bessamatic and Ultramatic cameras.

The name SEPTON refers to an enhanced optical design derived from the classic ULTRON, where an additional lens element was introduced to improve optical performance. This design became one of Voigtländer’s most legendary lenses.

Today, it returns in a modern version optimized for Sony full-frame mirrorless cameras, combining classic optical heritage with modern electronic compatibility.

Ultra-compact pancake design

With a total length of only 30 mm from the mount, this lens features an extremely compact pancake design, making it ideal for photographers who prefer lightweight and discreet equipment.

Its 40 mm focal length, offering a slightly wide-angle field of view, makes it a highly versatile lens suited for street photography, documentary work, travel, and everyday shooting.

Orthometar optical design with aspherical element

The Voigtländer SEPTON 40 mm F2.0 uses an Orthometar-type optical construction, known for its low distortion and short optical length.

The integration of an aspherical lens element further improves image quality while maintaining compactness. The result is a lens capable of delivering sharp, contrast-rich images across the frame, optimized for modern digital sensors.

Precise manual focus for a classic shooting experience

Like many Voigtländer lenses, the SEPTON emphasizes precise manual focusing, giving photographers full creative control.

The aperture ring features precise 1/3-stop click steps, ensuring accurate exposure control and a refined mechanical feel.

This traditional approach is particularly appreciated by enthusiast and professional photographers who value tactile control and craftsmanship.

Advanced electronic compatibility with Sony cameras

Despite its manual design, the lens includes electronic contacts that enable:

• recording of EXIF lens data

• compatibility with in-body 5-axis image stabilization

• automatic focus magnification in the viewfinder when turning the focus ring

An integrated distance encoder improves stabilization performance by providing distance information to the camera.

Versatile lens with close focusing capability

With a minimum focusing distance of 0.30 m, the Voigtländer SEPTON also supports close-up photography, making it suitable for tabletop photography, details and creative compositions.

This flexibility makes the lens an excellent everyday standard lens.

Premium all-metal construction

The lens features a full metal construction, ensuring:

• excellent durability

• high mechanical precision

• premium handling feel

A screw-in metal lens hood is included and maintains the compact design of the lens.

Box contents

• Voigtländer 40 mm F2.0 SEPTON Aspherical – Sony E-Mount – Black

• Screw-in metal lens hood

• Front cap

• Rear cap

Technical specifications summary

Product name
Voigtländer 40 mm F2.0 SEPTON Aspherical E-Mount

Lens type
Compact full-frame standard lens for Sony E-Mount

Key specifications

• Focal length: 40 mm

• Maximum aperture: F2

• Minimum aperture: F16

• Optical construction: 6 groups / 7 elements

• Angle of view: 57.3°

• Aperture blades: 10

• Minimum focusing distance: 0.30 m

• Maximum magnification: 1:5.3

• Maximum diameter: 61.7 mm

• Length: 30 mm

• Filter thread: 52 mm

• Weight: 165 g

• Lens hood: screw-in metal hood

• Electronic contacts: yes