NOKTON 40mm F1.2 Aspherical II

Smooth very blurred bokeh

Features

With its F1.2 maximum aperture, this lens has the largest maximum aperture for a rangefinder-coupled 40mm lens. The optical formula utilizes two elements with aspherical surfaces on both sides. As well as providing confidence-inspiring performance from maximum aperture, the lens allows you to enjoy smooth very blurred bokeh. With its extremely compact form considering its large maximum aperture, this lens is ideal for use on cameras with optical viewfinders and provides nimble operability.
*According to our research as of May 2025

Main Features

Outstanding optical performance, 4 aspherical surfaces utilized

With an 8 element optical configuration featuring 2 elements with aspherical surfaces on both sides, this lens achieves both a high image quality standard and a large maximum aperture.

Compact style

Despite its large maximum aperture, the short length of the lens ensures it only protrudes slightly into the rangefinder window. Weighting only 267 grams (without accessories), the lens provides nimble handling.

Minimum focus distance of 0.5 meters

The lens focuses beyond the minimum rangefinder-coupled focus distance of 0.7m all the way down to 0.5m. This feature is especially useful when using the lens on a camera with a live view function.

Bayonet type hood (sold separately)

A metal bayonet-type hood with slits to reduce vignetting when mounted on a rangefinder camera and which can be reversed-mounted when carried. Two types of hoods are available: the compact LH-14 and the longer, vintage-style LH-15.

Manual focus for reliable focusing

Employs a very precisely machined and adjusted all metal helicoid unit lubricated with high quality grease to realize smooth focusing operation with just the right amount of torque. This enables very precise focusing.

Bayonet type VM mount

Uses the VM-mount lens mount compatible with Leica M-mount. Not only can this lens be used on rangefinder-coupled cameras, but design-wise it also balances very nicely when mounted on mirrorless digital cameras with a mount adapter.

Installed with a focus-coupling system

The high-precision rangefinder coupling mechanism enables precise focusing in focus critical situations such as when shooting at or close to maximum aperture.

Imaging circle that covers full frame format

The lens features a generous imaging circle that covers the 35 mm full frame format. Furthermore, its size is extremely compact compared to interchangeable lenses for single-lens reflex cameras.