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NDフィルター露出計算機

ND filter calculator: calculate exposure time with ND filter from base shutter and stops with settings for long exposure, one-click copy and offline.

使い方

基礎シャッター（秒）と ND 段を入力すると、露出時間がリアルタイムに計算されます。

Overview

ND Filter Exposure Calculator is a Photography tool. ND filter calculator: calculate exposure time with ND filter from base shutter and stops with settings for long exposure, one-click copy and offline. It runs 100% in your browser with no upload, so you get instant results with privacy. Whether you need a quick answer or batch processing with precise control, you can enter, validate and export in seconds. The UI is responsive on mobile, tablet and desktop and supports one-click copy.

Use cases

  • Daily use of ND Filter Exposure Calculator: Enter base shutter (s) and ND stops to get the exposure time. — enter and get instant results without manual lookup.
  • One-click copy keeps results ready to save, check or share with family and pros.
  • Use ND Filter Exposure Calculator offline or on poor network — all calculations stay local and private.
  • Compare equivalent focal lengths to choose lenses
  • Preset low-light parameters instead of guessing

How to use

  1. 1 Enter base shutter (s) and ND stops to get the exposure time..
  2. 2 Review depth, exposure or equivalents and tweak
  3. 3 Verify with a test shot and compensate if needed
  4. 4 Save favorite combos for reuse

Highlights

  • Local & private: processing stays in your browser
  • Live validation with tolerant parsing
  • One-click copy and export for docs, code or sheets
  • Batch and offline support under poor network

Notes

  • Theory only—lens variance and filters shift results
  • Equivalents compare across formats; real aperture rules bokeh
  • Trust the histogram in backlit high-contrast scenes

FAQ

Phones too?
Yes. Enter equivalent focal length and aperture.
A stop off from real shots?
Metering mode and contrast—compensate and reshoot.
How is ND Filter Exposure Calculator different?
It runs locally with a focus on speed and privacy, plus tolerant parsing for “nd filter” and one-click copy for reuse.
Can I use results in official reports?
Use it as a working draft and cross-check with authoritative sources; keep the exported log and parameters for traceability.
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すべての計算はブラウザ内で実行され、データはアップロードされません。