Tube Spec Translator (EU/Asia → US Gen 3 format)
Enter Manufacturer Specs
U.S. and European SNR are both measured at ~108 µlx (≈1×10⁻⁵ fc).
We’ll convert to fL/fc (U.S.).
We’ll convert to “×10⁻¹¹ phot”.
U.S. Gen-3 Equivalent Output
Photocathode Sensitivity: — µA/lm
Resolution (center): — lp/mm
SNR: —
Gain (U.S.): — fL/fc
EBI (U.S. format): — ×10⁻¹¹ phot
Halo: — mm
FOM (Res × SNR): —
How do these conversions work?
- Gain: multiplied by π to convert from cd/m² per lux → fL per foot-candle.
- EBI: multiplied by 10 to convert from µlx → ×10⁻¹¹ phot.
All other specs (SNR, resolution, photocathode sensitivity, halo) are already directly comparable across manufacturers.