Leica M-E Typ 220 has a
18.0MP Full frame (36 x 24 mm ) sized CCD sensor . On the other hand, Leica M11-D has a
60.0MP Full frame (36 x 24 mm ) sized BSI-CMOS sensor and features Maestro III processor.
Leica M11-D's sensor provides 42MP more than Leica M-E Typ 220's sensor, which gives a significant advantage in real life. You can print your images larger or crop more freely.
On the other hand, please keep in mind that Max sensor resolution is not the only determinant of resolving power. Factors such as the optical elements, low pass filter, pixel size and sensor technology also affects the final resolution of the captured image.
Below you can see the M-E Typ 220 and M11-D sensor size comparison.
Sensor Size and Resolution Comparison image of Leica M-E Typ 220 and Leica M11-D Cameras
Leica M-E Typ 220 and Leica M11-D have the same sensor sizes so they will provide same level of control over the depth of field when used with same focal length and aperture. On the other hand, since Leica M-E Typ 220 has 233% larger pixel area compared to Leica M11-D, it has potential to collect more light on pixel level hence have less noise in low light / High ISO images.
DxOMark Sensor Scores
DxOMark is a benchmark that scientifically assesses image quality of camera sensors. It scores camera sensors for color depth (DXO Portrait), dynamic range (DXO Landscape) and low-light sensitivity (DXO Sports), and also gives them an overall score. Leica M-E Typ 220 and Leica M11-D sensors have been tested by DxO and the results show that M11-D has a better overall score of 100, 31 points higher compared to M-E Typ 220's score of 69.
Model
Overall
Color Depth
Dynamic Range
Low-light ISO
Leica M-E Typ 220
69
22.7 bits
11.7 Evs
787 ISO
Leica M11-D
100
26.3 bits
14.8 Evs
3376 ISO
Sensor size sets the circle of confusion, so it drives how much depth of field each
of these bodies gives you at a given aperture. You can calculate it exactly for the
Leica M-E Typ 220
or the
Leica M11-D ,
including hyperfocal distance.