Sigma fp has a Leica L lens mount and currently there are 31 native lenses available for this mount.
Sigma fp doesn't have a sensor based image stabilization system but 4 of these lenses already comes with optical image stabilization.
Since Sigma fp has a Full frame sensor, it has a focal length multiplier of 1x so you have to multiply lenses original focal length with this multiplier to find the Full Frame equivalent focal length of the lens when mounted on .
You may also also be interested in these:
Sigma fp Lenses with Image Stabilization
Sigma fp Lenses with Weather Sealings