The Pentax Spotmatic F 35mm is an SLR film camera. This Pentax Spotmatic film camera has a Pentaprism finder with microprism Fresnel lens that aids in instant focusing. The instant return type reflex mirror of this SLR film camera comes with special shock absorbers to ensure minimal vibration. This Pentax Spotmatic film camera has a focal plane shutter with speeds B, 1-1/1000 sec, One of the most sought after cameras from it's era - screw on mount. No lens