Sony A7R IV has a
61.0MP Full frame (35.8 x 23.8 mm ) sized BSI-CMOS sensor and features Bionz X processor. 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.
Another difference between these two cameras is that Sony A7R IV's sensor lacks anti-alias (Low-Pass) filter. Removing anti-alias filter increases the sharpness and level of detail but at the same time, it increases the chance of moiré occurring in certain scenes.
Below you can see the A7R IV and M11-D sensor size comparison.
Sensor Size and Resolution Comparison image of Sony A7R IV and Leica M11-D Cameras
Sony A7R IV and Leica M11-D have almost the same sensor size, so neither of them has any significant advantage over the other in terms of providing control over depth of field when used with the same focal length and aperture.
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. Sony A7R IV and Leica M11-D sensors have been tested by DxO and the results show that M11-D has a better overall score of 100, 1 points higher compared to A7R IV's score of 99.
Model
Overall
Color Depth
Dynamic Range
Low-light ISO
Sony A7R IV
99
26.0 bits
14.8 Evs
3344 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
Sony A7R IV
or the
Leica M11-D ,
including hyperfocal distance.
