The Chinese company Yongnuo has released an ultra-wide-angle lens with an autofocus system – Yongnuo YN 11mm F/1.8S DA DSM WL for Sony cameras with APS-C matrices. Previously, this optics was released for Nikon Z. Moreover, the lens has a built-in remote focusing system using a wireless remote control, which has a frequency of 2.4 GHz. In the future, the lens will also be available for Fujifilm X cameras.
The Yongnuo YN 11mm F/1.8S DA DSM WL lens has an available aperture range of F/1.8-F/16. The diaphragm design is seven-blade.
The optical design of the lens consists of 10 elements in 9 groups. Including three low dispersion elements, two extra-low dispersion elements, three high refractive index elements and two aspherical lenses. The manufacturing company has published a drawing of the optical design of the Yongnuo YN 11mm F/1.8S DA DSM WL lens:
The minimum focusing distance available when shooting with the new lens from Yongnuo is 0.15 m, and the maximum magnification is 0.15x. MTF graphs at different aperture values look like this:
The lens filter diameter is 58mm, and its dimensions are 66x69mm. The lens weighs 260 grams. There are various switches on the lens body: aperture operating modes (with and without clicks), a programmable button, as well as the aperture adjustment ring itself.
There is also a USB-C port for updating the lens firmware.
The optics are a fairly good option for shooting with an ultra-wide viewing angle and at the same time with a high aperture ratio – F/1.8.
It was previously reported that the Yongnuo YN 12-35mm F/2.8-4 autofocus lens for M4/3 went on sale. The lens provides a standard set of focal lengths, equivalent to 24-70mm (at full frame). The manufacturer reported that the optical design of the new Yongnuo YN 12-35mm F/2.8-4 for M4/3 uses aspherical lenses, elements with low dispersion and high refractive index. All of them allow you to control aberrations and obtain a sharp image.