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Ubify Media & Design Operations
UI/UX & DIGITAL MEDIA SPECIALISTS
About This Tool
This photographic exposure utility evaluates comparative shutter speeds and optical density factors for neutral density (ND) filters. Enter baseline shutter speed 1, optical stop factor 2, and reference aperture divisor 3.
Note on implementation: this interactive component evaluates a proportional index ratio (val1 × val2 / val3), a geometric root factor sqrt(val1 × val2), and an exposure proportion percentage (val1 / (val1 + val2) × 100). It serves as a comparative three-parameter calculation model rather than a continuous logarithmic f-stop table solver. All calculations evaluate entirely on-device inside your browser.
How to Use
- 1
Enter the base shutter speed value (in seconds or fraction multiplier) into the Value 1 field.
- 2
Enter the ND filter density factor or optical stop multiplier into the Value 2 field.
- 3
Set the reference aperture divisor into the Value 3 field.
- 4
Review the calculated proportional exposure index, geometric shutter factor, and transmission ratio percentage.
Frequently Asked Questions
How does an ND filter affect required shutter speed?
Each full stop of neutral density halves the light entering the camera lens, requiring a doubling of shutter speed to maintain identical exposure (e.g., a 6-stop ND filter multiplies exposure duration by 2^6 = 64).
Does this calculator evaluate certified optical filter density charts?
No. The calculator runs a three-parameter proportional ratio index model. For camera exposure tables, calculate final shutter speed using T_new = T_base × 2^stops.
Are photography settings or camera data sent to a server?
No. All calculations run strictly in your local browser session using client-side JavaScript.