Panasonic ZS50 has a 12.0MP (6.17 x 4.55 mm ) sized CMOS sensor . You can shoot at maximum resolution of 4000 x 3000 pixels with aspect ratios of 1:1, 4:3, 3:2 and 16:9. ZS50 has a native ISO range of 80 - 6400 and it can save files in RAW format which gives you a wider room for post processing.
Panasonic ZS50 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 ZS50 vs Canon SX740 HS or take a look at Highest resolution Compact cameras list.
Panasonic ZS50 DxOMark Sensor Scores
DxOMark is a benchmark that scientifically assesses image quality of camera sensors. Panasonic ZS50 sensor has been tested by DxO Mark and got an overall score of 44 for its image quality. You can find the details of their analysis of Panasonic ZS50 here.
Let's look at how the size of the Panasonic ZS50's sensor compares with other standard sensor sizes.
Comparison image of Panasonic ZS50 Sensor Size with other standard sensors
Sensor size is what determines the circle of confusion, and therefore how much
depth of field Panasonic ZS50 gives you at any given aperture.
You can
calculate
the exact depth of field for the Panasonic ZS50
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.