Canon G1 X has a 14.0MP 1.5-inch (18.7 x 14 mm ) sized CMOS sensor and features Digic 5 processor. You can shoot at maximum resolution of 4352 x 3264 pixels with aspect ratios of 1:1, 5:4, 4:3, 3:2 and 16:9. G1 X has a native ISO range of 100 - 12800 and it can save files in RAW format which gives you a wider room for post processing.
Canon G1 X is the highest resolution 1.5 inch Sensor camera in our database. The closest competitor in this class is Canon G1 X II with its 13.0MP sensor. Check the comparison of Canon G1 X vs Canon G1 X II or take a look at Highest resolution Compact cameras list.
Canon G1 X DxOMark Sensor Scores
DxOMark is a benchmark that scientifically assesses image quality of camera sensors. Canon G1 X sensor has been tested by DxO Mark and got an overall score of 60 for its image quality. You can find the details of their analysis of Canon G1 X here.
Let's look at how the size of the Canon G1 X's 1.5-inch sensor compares with other standard sensor sizes.
Comparison image of Canon G1 X Sensor Size with other standard sensors