The Pentax SFXN is a camera with an electronically controlled shutter. This means you will need 1x 2CR5 battery to be able to operate the camera.
It uses Pentax K-AF-mount lenses.
The SFXN is a great entry-level SLR. It's the little brother of the SFW and it shares a lot of that technology. It's incredibly simple to use and It takes Pentax K-AF lenses but it also uses classic K-mount glass.
It has amazing metering (even spot metering!) and a max speed of 1/4000s (!) and features programmed automatic modes, along with aperture and shutter-priority modes. It can also be shot in full manual mode.