FujiFilm AV250 has a 16.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized CCD sensor . You can shoot at maximum resolution of 4608 x 3440 pixels. AV250 has a native ISO range of 100 - 1600 which can be boosted to 3200 but unfortunately, FujiFilm AV250 doesn't have RAW file support. If you need a Compact camera with a RAW support, consider Leica Q (Typ 116) or Casio Exilim EX-10 in the same price range.
FujiFilm AV250 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 FujiFilm AV250 vs Canon SX740 HS or take a look at Highest resolution Compact cameras list.
Let's look at how the size of the FujiFilm AV250's 1/2.3-inch sensor compares with other standard sensor sizes.
Comparison image of FujiFilm AV250 Sensor Size with other standard sensors
Sensor size is what determines the circle of confusion, and therefore how much
depth of field FujiFilm AV250 gives you at any given aperture.
You can
calculate
the exact depth of field for the FujiFilm AV250
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.