16mm F2.0 High Speed Wide Angle Mount:Pentax K Shutter Lock must be disengaged

Shutter Lock must be disengaged on the camera's menu

5º and on an APS-C size sensor has an angle of view of 59

With an ultra-wide angle of view plus a relatively fast f/2

10mm lens with 109

increases contrast and reduces flare

16mm F2.0 High Speed Wide Angle Mount:Pentax K Shutter Lock must be disengagedThe 16mm f 2. 0 ED AS UMC CS Lens from Rokinon is a manual focus wide angle lens compatible with APS C format DSLR digital cameras. It provides a 79. 5 angle of view which translates into a 35mm format equivalency of 25. 6mm. A fast maximum aperture of f 2. 0 is effective in low light shooting and provides shallow depth of field. With two aspherical lens elements and one extra low dispersion element, chromatic aberrations are minimized and sharp,