Kershaw Nerve, Kershaw Salvo, and the handy Ultra Tek Sharpener Kershaw Nerve, Kershaw Salvo, and the handy Ultra Tek Sharpener Technical Details Camera: Canon PowerShot SD1000 Taken: October 4, 2011 Focal length: 5mm Aperture: f/2 Exposure: 1/8 second ISO: 200