Circle of Confusion
Calculate CoC from sensor, print size, and viewing distance
Calculate CoC from sensor, print size, and viewing distance
Standard CoC: 0.03mm
Standard assumption for most calculations
Calculated CoC
0.0186 mm
18.6 µm
Standard CoC
0.0288 mm
More demanding
Enlargement
7.1×
sensor to print
Resolution Needed
10 MP
for this CoC
Analysis
Viewing conditions are typical. Standard CoC values should work well.
Print resolution: 7.6 lp/mm
Standard CoC Values by Sensor
| Sensor | Size (mm) | Standard CoC |
|---|---|---|
| Full Frame (35mm) | 36 × 24 | 0.03 mm |
| APS-H (Canon) | 28.7 × 19 | 0.023 mm |
| APS-C (Canon) | 22.3 × 14.9 | 0.018 mm |
| APS-C (Nikon/Sony/Fuji) | 23.5 × 15.6 | 0.019 mm |
| Micro Four Thirds | 17.3 × 13 | 0.015 mm |
| 1 inch | 13.2 × 8.8 | 0.011 mm |
| 1/1.7" | 7.6 × 5.7 | 0.006 mm |
| 1/2.3" | 6.17 × 4.55 | 0.005 mm |
| Medium Format (Fuji GFX) | 43.8 × 32.9 | 0.036 mm |
| Medium Format (Hasselblad) | 53.4 × 40 | 0.043 mm |
How CoC is Calculated
Traditional Formula: CoC = Sensor Diagonal ÷ 1500
This assumes an 8×10" print viewed at 25cm (10 inches) by someone with average visual acuity.
Adjusted Formula (used here):
CoC = (Viewing Distance ÷ 57.3) ÷ (2 × Visual Acuity × Enlargement Factor)
This calculation accounts for your specific viewing conditions and output size.