Low-Light Performance Calculator|
Compare light gain, perceived brightness, and overall low-light performance
in relation to objective lens diameter, magnification, exit pupil diameter,
light transmission, approximate exit pupil diffraction, and eye pupil diameter.
For Fixed & Variable Power Scopes
| Number of Scopes to Compare: |
Enter only two of the three scope properties for each line below:
Use only the first line for fixed-power scopes, or both lines for variable-power scopes
Resolution, contrast, and realistic light transmission greatly affect the low-light performance.|
Because these properties are not available for most scopes, this calculation is best used for comparing scopes among the same brand and scope line.
If you are unsure of the utilized benchmarks for Light Transmission, it may be best to leave Light Transmission fields empty.