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IRIX 11mm f/4 Blackstone Ultra-Wide Angle Lens for Pentax

The IRIX 11mm f/4 Blackstone Lens for Pentax K is an ultra-wide prime, precision-engineered for Pentax K-mount DSLRs. Its rectilinear design minimizes distortion and chromatic aberrations, achieving sharp and color-accurate imagery, thanks to its employment of aspherical, extra-low dispersion, and high-refractive index optics. The lens coating minimizes flare and ghosting, maintaining high contrast in bright conditions. Manually focusing, it allows detailed control with a unique positive lock for consistent shots. The Blackstone variant features robust aluminum and magnesium alloy construction, high visibility engraved markings with UV reactive paint, and thorough weather sealing for reliability in challenging conditions.