Fresnel Reflection Calculator vs ND Filter Exposure Calculator
Two calculators for the same neighbourhood of questions. Here is what each measures, what you feed in, and where you'd reach for one over the other.
Fresnel Reflection Calculator
Calculate the percentage of light reflected at an optical interface for s- or p-polarization using the Fresnel equations. Indispensable for anti-reflection coating design, laser optics, and photography filter analysis.
- Answers
- Reflectance (%)
- Inputs
- Refractive Index 1, Refractive Index 2, Incident Angle, Polarization
ND Filter Exposure Calculator
Calculate the correct long-exposure shutter speed when using one or more stacked ND filters. Essential for landscape and waterfall photographers who need to adjust for light reduction and film reciprocity failure.
- Answers
- Required Exposure Time (seconds)
- Inputs
- Base Shutter Speed, ND Filter Strength, Number of Stacked Filters, Reciprocity Failure Factor
At a glance
| Fresnel Reflection Calculator | ND Filter Exposure Calculator | |
|---|---|---|
| Category | Optics | Photography |
| Answers | Reflectance | Required Exposure Time |
| Inputs | 4 | 4 |
| Result unit | % | seconds |
When to use each
Calculate the percentage of light reflected at an optical interface for s- or p-polarization using the Fresnel equations. Indispensable for anti-reflection coating design, laser optics, and photography filter analysis.
Calculate the correct long-exposure shutter speed when using one or more stacked ND filters. Essential for landscape and waterfall photographers who need to adjust for light reduction and film reciprocity failure.