This is a rectilinear ultra-wide lens for Pentax K-Mount full frame and aps-c digital cameras, 35mm film cameras, and others which can be adapted to the K-bayonet mount. The two sample images happen to be both night shots from the boundary waters, but I do have a few others available. The reality is I had to sell my K1 a year ago, and I’m not buying another one any time soon. I’ve still got Pentax film cameras but I just don’t shoot them much and I can use the cash. I have the box somewhere - if I find it I’ll include it. This lens is in like new condition. No scratches - only about 300 pics shot through it.. (Rectilinear means it utilizes a design that minimizes barrel and fish-eye style distortion- so straight lines stay straight.) Full Frame Ultra-WIde-Angle Lens The Rokinon 14mm Ultra-Wide-Angle f/2.8 lens is designed to provide a dramatic 115.7° view on full frame cameras.and is perfect for astrophotography, landscapes and real estate imagery. It also works well with DSLR and Mirrorless cameras with the Pentax K mount, or with necessary adapters to provide approximately an angle of view of 94° with APS-C cameras. The advanced 14 element 10 group design focuses to a close 11" (0.28mm) to produce sharply defined images with a minimum of distortion and chromatic aberrations. It utilizes 2 ED elements, 1 Hybrid Aspherical element, 3 High Refractive Index elements, and one glass Aspherical element, for outstanding, sharply defined rectilinear images. This ultra-wide-angle Rokinon utilizes Ultra Multi Coating to reduce flare and ghost images, Includes a built-in petal-type lens hood and large lens cap. Low CA Low Coma Full Frame Fast F2.8 Aperture Focuses to 11" (0.28m) Rectilinear Ultra-Wide-Angle View Perfect for Astrophotography Focuses to 11" (0.28m)