The Kowa Prominar 12mm F1.8 MFT Lenshas a wide angle of view and a 12mm focal length. Also has a bright F1.8 aperture, and its distortion value has also been reduced to 0.59%. Kowa Prominar 12mm F1.8 MFT Lens The Kowa Prominar 12mm F1.8 MFT Lenshas a wide angle of view and a 12mm focal length. Also has a bright F1.8 aperture, and its distortion value has also been reduced to 0.59% Circular Aperture Kowas XD Lenses (extra-low dispersion glass), when combined with a concave lens possessing special dispersion properties, reduces a very high percentage of chromatic aberration. The construction of the aperture blades with 9 elements makes it possible that the diaphragm shows a circle at all f-stops, creating a more natural impression. A dual Link Iris system makes it possible to choose silent or click aperture adjustment. Aperture settings can be changed in an instant to suit the photographic subject. Aluminium Alloy Body All internal parts ar