Olympus E-PL1 has a 12.0MP Four Thirds (17.3 x 13 mm ) sized CMOS sensor and features Truepic V processor. You can shoot at maximum resolution of 4032 x 3024 pixels with aspect ratios of 4:3, 3:2 and 16:9. E-PL1 has a native ISO range of 100 - 3200 and it can save files in RAW format which gives you a wider room for post processing.
Olympus E-PL1 is not the highest resolution Four Thirds camera. Panasonic GH7 with its 25.0MP sensor is leading in this class. Check the comparison of Olympus E-PL1 vs Panasonic GH7 or take a look at Highest resolution Mirrorless cameras list.
Olympus E-PL1 DxOMark Sensor Scores
DxOMark is a benchmark that scientifically assesses image quality of camera sensors. Olympus E-PL1 sensor has been tested by DxO Mark and got an overall score of 54 for its image quality. You can find the details of their analysis of Olympus E-PL1 here.
Let's look at how the size of the Olympus E-PL1's Four Thirds sensor compares with other standard sensor sizes.
Comparison image of Olympus E-PL1 Sensor Size with other standard sensors
Sensor size is what determines the circle of confusion, and therefore how much
depth of field Olympus E-PL1 gives you at any given aperture.
You can
calculate
the exact depth of field for the Olympus E-PL1
at any focal length, aperture and subject distance, including the hyperfocal distance
for landscapes and the very shallow focus zone you get with long telephoto lenses.
