The Pentax SF7 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 SF7 is a great entry-level SLR. 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, shutter speeds between 30s and 1/2000s, and features programmed automatic modes, along with aperture and shutter-priority modes. It can also be shot in full manual mode.
Just like the Minolta Dynax cameras, it's a niche electronic SLR, but highly capable and good for just about any job.