Canon SX220 HS has a 12.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized BSI-CMOS sensor and features DIGIC 4 with iSAPS technology processor. You can shoot at maximum resolution of 4000 x 3000 pixels with aspect ratios of 1:1, 4:3, 3:2 and 16:9. SX220 HS has a native ISO range of 100 - 3200 but unfortunately, Canon SX220 HS 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.
Canon SX220 HS 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 Canon SX220 HS vs Canon SX740 HS or take a look at Highest resolution Compact cameras list.
Let's look at how the size of the Canon SX220 HS's 1/2.3-inch sensor compares with other standard sensor sizes.
Comparison image of Canon SX220 HS Sensor Size with other standard sensors
Sensor size is what determines the circle of confusion, and therefore how much
depth of field Canon SX220 HS gives you at any given aperture.
You can
calculate
the exact depth of field for the Canon SX220 HS
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.
