Interesting... and large! Here's Cosina's commentary, Google translation:
Koshina Co., Ltd. will launch the Voigtlender interchangeable lens "NOKTON 21mm F1.4 Aspherical VM" in February. The suggested retail price is 150,000 yen excluding tax.
A wide-angle, large-diameter lens that uses a Leica M mount compatible VM mount. The feature is that wide-angle shooting is possible while taking advantage of blur. A lens with the same name for the Sony E-mount has been released, and a VM version that also supports rangefinder linkage will be newly added.
The lens configuration is basically the same as the E-mount version, but the VM-mount version is optimized for Leica M Digital image sensors. The use of an aspherical lens reduces distortion, and the extraordinary partial dispersion glass reduces chromatic aberration. By adopting a floating mechanism, the image quality during close-up shooting is also considered.
It is said that the adoption of a floating focus mechanism is the first for Voigtren rangefinder camera lenses.
The lens configuration is 13 elements in 11 groups. The shortest shooting distance is 50cm. Range of interlocking rangefinder is shortest 70cm.
The minimum aperture is F16. There are 12 aperture blades. The filter diameter is 62mm.
Maximum diameter x total length is 69.5 x 69.7mm. Weight is 480g.
Comes with a plastic square bayonet hood.
