Meticulously machined high-grade aluminum barrel, lens hood (which is fixed) and cap construction, retaining the attractive design -both to the eye and to the touch- of this legendary Limited series
Optics treated with Pentax HD Coating, which provides higher light transmittance and lower reflectance for images free of flare and ghosting
Rounded 9-blade diaphragm to produce a more pleasing bokeh effect. Aperture remains round from f1.8 to f3.5
SP (Super Protect) coating on the front lens to repel substances such as grease, dust and water
9-element optical construction arranged in 7 groups, including aspherical, high-refractive, and low-dispersion elements to provide sharp, well-defined images
70 degree angle of view when mounted on a full frame Pentax camera, and 49 degree when attached to an APS-C body
