Medium Format 44×33 mm Sensor vs. Micro Four Thirds Sensor
Comparing 2 standards across 10 specifications. 9 key differences identified.
The 44×33 Medium Format Sensor (measuring 43.8 × 32.9 mm with an active surface area of ~1441 mm² and a 54.78 mm diagonal) provides approximately 1.67× the physical surface area of a 35mm full-frame sensor. Operating with a 0.79× 'reverse crop factor' and a native 4:3 aspect ratio, it is the digital medium format standard deployed in mirrorless systems by Fujifilm (GFX series) and Hasselblad (X system).
The Micro Four Thirds (MFT) Sensor (measuring 17.3 × 13.0 mm with an active area of 224.9 mm² and a 21.64 mm diagonal) is an open mirrorless standard established by Olympus and Panasonic, featuring an exact 2.0× crop factor and a native 4:3 aspect ratio. Equal to exactly half the diagonal of 35mm full frame, focal length calculations are simple integers (25mm = 50mm equivalent).
Specification Comparison Table
10 Parameters| Parameter / Spec | ||
|---|---|---|
|
Dimensions (Width × Height)
|
43.8 × 32.9 mm (1.724 × 1.295 in) | 17.3 × 13.0 mm (0.681 × 0.512 in) |
|
Diagonal Dimension
|
54.78 mm | 21.64 mm (exactly half of 35mm full frame's 43.27 mm diagonal) |
|
Active Surface Area
|
1441.0 mm² (approx. 1.67× larger than 35mm full frame) | 224.9 mm² (approx. 26.0% of 35mm full frame) |
|
Native Aspect Ratio
|
4 : 3 (1.33 : 1) | 4 : 3 (1.33 : 1) |
|
Crop Factor (Relative to 35mm)
|
0.79× (Reverse crop / wide-angle focal multiplier) | — |
|
35mm Equivalent Focal Length
|
Multiply lens focal length by 0.79 (e.g. 63mm f/2.8 lens ≈ 50mm f/2.2 full-frame equivalent) | — |
|
Flagship Camera Implementations
|
Fujifilm GFX 100 II / 100S / 50S, Hasselblad X2D 100C / 907X 50C, Pentax 645Z | — |
|
Crop Factor
|
— | 2.00× exactly |
|
Focal Length Equivalence Formula
|
— | Focal length × 2.0 (e.g. 12-40mm f/2.8 lens ≈ 24-80mm f/5.6 full-frame field/DoF) |
|
Camera Systems
|
— | OM System OM-1 / OM-5, Panasonic Lumix GH6 / G9 II / BGH1, Blackmagic Pocket Cinema Camera 4K |