APS-C Sensor (1.5×) vs. Micro Four Thirds Sensor
Comparing 2 standards across 8 specifications. 8 key differences identified.
The Standard APS-C Sensor (measuring 23.5 × 15.6 mm with an active area of 366.6 mm² and a 28.21 mm diagonal) operates with a 1.53× (commonly rounded to 1.5×) crop factor relative to 35mm full frame. Standardized across Sony E-mount (Alpha 6000 series), Nikon DX (Z50, D500), and Fujifilm X-mount systems, it is the most popular interchangeable-lens enthusiast format.
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
8 Parameters| Parameter / Spec | ||
|---|---|---|
|
Dimensions (Width × Height)
|
23.5 × 15.6 mm (approx. 23.6 × 15.7 mm depending on silicon fab) | 17.3 × 13.0 mm (0.681 × 0.512 in) |
|
Diagonal Dimension
|
28.21 mm | 21.64 mm (exactly half of 35mm full frame's 43.27 mm diagonal) |
|
Active Surface Area
|
366.6 mm² (approx. 42.4% of 35mm full frame) | 224.9 mm² (approx. 26.0% of 35mm full frame) |
|
Crop Factor
|
1.53× (Standard 1.5× focal length multiplier) | 2.00× exactly |
|
Native Aspect Ratio
|
3 : 2 (1.50 : 1) | 4 : 3 (1.33 : 1) |
|
Camera Systems
|
Fujifilm X-T5/X-H2/X100VI, Sony A6700/FX30, Nikon Z50/Zfc, Ricoh GR III | OM System OM-1 / OM-5, Panasonic Lumix GH6 / G9 II / BGH1, Blackmagic Pocket Cinema Camera 4K |
|
35mm Equivalent Calculation
|
A 35mm lens yields the field of view of a 53.5mm lens on full frame (35 × 1.53) | — |
|
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) |