The NOKTON 21mm F1.4 Aspherical VM is a large maximum aperture manual focus lens optimized for the imaging sensors of VM-mount digital cameras. The 21mm focal length covers an angle of 90.3° to create a super dynamic perspective.
Generally the wider a lens gets, the deeper the depth of focus of the lens; however, with the NOKTON 21mm F1.4 Aspherical VM-mount lens, the extremely large maximum aperture for a super wide-angle lens enables imaging that utilizes “bokeh”(out-of-focus blur).
Voigtländer Nokton 21mm F/1.4 Aspheric VM official webpage
