New advanced focus lock, infinity click and hyper-focal scale features by Irix is setting a new level of manual focus lens functionality. This is achieved through very sophisticated optical construction and a special neutrino coating, color aberration, ghosting and flare effects have been reduced to an absolute minimum. The new Nikon by Irix lens has a minimum focusing distance of 280 mm and has 9 rounded shaped aperture blades, this lens achieves supremely smooth "out-of-focus" areas. 95 mm screw-in filters can be fitted at the front in the petal-shape lens hood and gelatin filters at the rear of the lens. The Blackstone, for Nikon has an extremely durable body made with aluminum-magnesium alloy to ensure full protection, even in extreme conditions. The Blackstone has 4 rubber seals to protect the camera mount and focusing mechanism against dust and moisture The seals will also provide protection for front and side accidental water splashes. Fluorescent markings makes it easy to read in low light conditions. Lens Specifications: Image Size: 35mm "Full Frame" Focal Length: 15mm Field of View: 110 degrees (diagonal) Focusing Range: 0.28 m - infinite Focusing Type: Manual with lock function Aperture Range: F/2.4 ? F/22 Aperture Control: Via camera

Shape: 9 rounded blades Lens Construction: 15 elements in 11 groups (3x HR, 2x ED, 2x ASP) Front Filter Thread: 95 x 1.0mm Rear Gelatin Filter Slot: 30 x 30mm Dimensions (D x H): 114 x 100mm Weight: 685g Lens Features Housing Material: Aluminum-magnesium alloy, premium finish Housing Outer Finish: Anti-scratch Focusing Ring Material: All-metal anodized ring with grooved surface Markings Method: Engraved Markings Paint: UV light reactive paint Weather Sealing: Front lens element, focus lock, focus ring, camera mount Case Included: Hard lens case Included in the Package: Irix 15mm F/2.4 Blackstone Lens hood with easy access facility for filter adjustments Front lens cap Two rear lens caps Hard lens case Metal box package What's in the box 15mm Prime Lens Hard Case Lens Hood Lens Caps