Panasonic FS12 has a 12.0MP 1/2.3-inch (6.08 x 4.56 mm ) sized CCD sensor . You can shoot at maximum resolution of 4000 x 3000 pixels with aspect ratios of 4:3, 3:2 and 16:9. FS12 has a native ISO range of 80 - 1600 which can be boosted to 6400 but unfortunately, Panasonic FS12 doesn't have RAW file support. If you need a Compact camera with a RAW support, consider or in the same price range.
Panasonic FS12 is not the highest resolution Small Sensor camera. Canon SX740 HS with its 21.0MP sensor is leading in this class. Check the comparison of Panasonic FS12 vs Canon SX740 HS or take a look at Highest resolution Compact cameras list.
Let's look at how the size of the Panasonic FS12's 1/2.3-inch sensor compares with other standard sensor sizes.
Comparison image of Panasonic FS12 Sensor Size with other standard sensors
Sensor size is what determines the circle of confusion, and therefore how much
depth of field Panasonic FS12 gives you at any given aperture.
You can
calculate
the exact depth of field for the Panasonic FS12
at any focal length, aperture and subject distance, including the hyperfocal distance
for landscapes and how close you can get before the focus zone becomes too thin.