Canon PowerShot G1X ReviewTuesday January 31 2012 Sensor Review
A great camera but no specific improvement of the Canon sensor
Overall the G1X is definitely an excellent point and shoot cameras. But, now for the bad news in this review: The G1X’s sensor itself shows no measurable improvement. As proof, we need to take a look at the results of the Canon EOS 7D vs Canon PowerShot G1X. Why this comparison?
- The G1X and the 7D sensors make use of the same size pixel (4.2 µm).
- The Canon EOS 7D is a bit dated, but the Canon APS-C cameras that came after it didn’t have any new sensor features (see the results for the Canon EOS 600D and 60D).
Normalized results (print mode):
- As explained here, DxOMark scores are normalized for a 20 x 30 print at 300 dpi. The Canon EOS 7D’s sensor surface format is slightly superior and thus it logically ends up better placed in the low-light rankings.
Non-normalized results (screen mode):
- Here we are interested only in pixel quality, so let’s take a look at the curves for SNR 18%, dynamic range, and color sensitivity when we toggle to screen mode. The results are surprising: The G1X pixel provides identical results for SNR 18% and color sensitivity as the Canon EOS 7D, and only very slightly inferior results for dynamic range.
So while you will enjoy the same kinds of good qualities for the G1X as for Canon’s APS-C cameras, you will also experience the same problems (see our review of the Canon 500D vs D5000 cameras): The dynamic range is still limited by significant noise at low ISO.