The smc FA 45mm f/2.8 Lens from Pentax is a moderately wide angle lens with a 35mm format equivalent focal length of 35.5mm and a 63 degree angle of view. Used by many as a substitute for the 75mm "normal" lens it's a favorite of street shooters and wedding photographers alike and also ideal for landscapes, groups, or interiors. Its fast 2.8 maximum aperture is brighter in the viewfinder and allows low light shooting without hiking up the ISO, renders artfully blurred backgrounds and permits higher shutter speeds in standard lighting conditions. A lens hood is included to reduce flare and ghosting as is a lens case.
With a 35mm format equivalent of 35.5mm, this lens is used by many as a normal lens
The fast 2.8 maximum aperture gives you a host of benefits including a bright viewfinder image, low light shooting capability and a more easily blurred background