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Canon patent application reveals optical designs for three F2.8 ultra-wide RF mount lenses

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Canon patent application reveals optical designs for three F2.8 ultra-wide RF mount lenses

A new patent application from Canon has revealed the company is working to develop a trio of ultra-wide lenses for its RF mount mirrorless cameras.

First seen by Canon News, the patent application details the optical designs for a 12mm F2.8 lens, a 14mm F2.8 lens and a 20mm F2.8 lens. Typically, these patent applications show off multiple optical designs that don’t always make it to market, but Canon has both a 14mm F2.8 and 20mm F2.8 lens for its EF mount cameras, so it’d make sense to carry those two options over to its mirrorless mount.

Below are illustrations and technical breakdown of each lens Canon has laid out in Japan patent application 2021–047384.

12mm F2.8

An illustration of the optical construction for the 12mm F2.8 lens Canon has filed a patent application for.
Focus Distance 12.35mm
F Number 2.88
Half Angle (º) 60.28º
Image Height 21.64mm
Total Lens Length 80.22mm

14mm F2.8

An illustration of the optical construction for the 14mm F2.8 lens Canon has filed a patent application for.
Focus Distance 14.42mm
F Number 2.88
Half Angle (º) 56.32º
Image Height 21.64mm
Total Lens Length 91.61mm

20mm F2.8

An illustration of the optical construction for the 20mm F2.8 lens Canon has filed a patent application for.
Focus Distance 19.48mmmm
F Number 2.88
Half Angle (º) 48.02º
Image Height 21.65mm
Total Lens Length 90.74mm

As with all patent applications, or even patents that have been granted for that matter, there’s no guarantee these will ever be developed further. But two of the three designs are similar to past lenses Canon has released, so it’s not out of the realm of possibilities that we could see at least one of these designs in the future.

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  1. Pingback: Field review: Fujifilm XF 70-300 F4-5.6 R LM OIS WR | godsownmedia

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7Artisans launches $130 APS-C 27mm F2.8 for Sony E mount

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7Artisans launches $130 APS-C 27mm F2.8 for Sony E mount


Image: 7Artisans

Chinese lens maker 7Artisans has announced the AF 27mm F2.8 prime lens for APS-C cameras using the Sony E-Mount.

The 27mm focal length gives a fractionally wide-angle ∼41mm equivalent field of view, while the semi-fast F2.8 maximum aperture should give some control over depth-of-field and better low-light performance than a kit zoom.

The compact prime consists of six elements in five groups. It uses a stepper motor and internal focus design, which is potentially promising in terms of autofocus speed. Unusually for a modern lens, it makes no use of aspherical, ED or other special glass, and features just six aperture blades.

The 48mm (1.9″) long, 173g (5.0oz) lens features a USB 3.0 socket on its side, allowing firmware updates. It has a minimum focus distance of 0.3m (11.8″) and accepts 52mm threaded filters. It is available immediately at a recommended price of $129.



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7Artisans launches $130 APS-C 27mm F2.8 for Sony E mount

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7Artisans launches $130 APS-C 27mm F2.8 for Sony E mount


Image: 7Artisans

Chinese lens maker 7Artisans has announced the AF 27mm F2.8 prime lens for APS-C cameras using the Sony E-Mount.

The 27mm focal length gives a fractionally wide-angle ∼41mm equivalent field of view, while the semi-fast F2.8 maximum aperture should give some control over depth-of-field and better low-light performance than a kit zoom.

The compact prime consists of six elements in five groups. It uses a stepper motor and internal focus design, which is potentially promising in terms of autofocus speed. Unusually for a modern lens, it makes no use of aspherical, ED or other special glass, and features just six aperture blades.

The 48mm (1.9″) long, 173g (5.0oz) lens features a USB 3.0 socket on its side, allowing firmware updates. It has a minimum focus distance of 0.3m (11.8″) and accepts 52mm threaded filters. It is available immediately at a recommended price of $129.



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7Artisans announces AF50mm F1.8 for Nikon Z mount

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7Artisans announces AF50mm F1.8 for Nikon Z mount


Image: 7Artisans

7Artisans has announced a version of its full-frame AF 50mm F1.8 lens for Nikon’s Z mount.

The lens, already available for Sony E mount, is 104mm (4.1″) long and weighs 421g (14.9oz).

Its optical formula is made up of 11 elements in 9 groups, including two aspherical, one ED and two high refractive index lenses. It features an 11-blade aperture diaphragm. It uses a stepper motor to drive an internal focus design.

Minimum focus distantce is 0.5m (19.7″) and it accepts 62mm threaded filters.

The company says it will be available soon at a price of $228.


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