# Luma Calc — Exposure & ND Filter Calc

> Exposure & ND Filter Calc (iPhone/iPad app by yeongsu son.)

- Source: https://appshunter.io/ios/app/luma-calc/id6741770226 (this page in markdown: same URL + `.md`)
- Developer: [yeongsu son](https://appshunter.io/developer/1795476431)
- Category: Photo & Video
- Price: Free
- Age rating: 4+
- Requires: iOS 13.0 · 19 MB
- Languages: American English
- Released: 2025-02-13
- Data updated: 2026-03-25
- User reviews in markdown: https://appshunter.io/ios/app/luma-calc/id6741770226/reviews.md

## What is Luma Calc?

LumaCalc is an exposure calculator for photographers and videographers.

Change your aperture, ISO, ND filter, or EV compensation — LumaCalc instantly tells you the exact shutter speed needed to maintain a correct exposure. No more mental math on set.

◆ Perfect for
- Photographers who attach ND filters and need to recalculate shutter speed every time
- Long exposure shooters who want to know the exact duration before pressing the shutter
- Anyone who adjusts aperture or ISO and needs a quick exposure correction on the fly
- Studio, outdoor, and video shooters who need fast, reliable settings

◆ Features

[Exposure Triangle Calculator]
Enter your current camera settings (aperture · ISO · shutter speed), then set your new values. The correct shutter speed is calculated in real time — no confirm button needed, results update instantly as you scroll.

[ND Filter Calculator]
Supports 23 ND filter densities from ND0 (no filter) to ND512K (512,000× light reduction). Instantly see the required shutter speed for any filter you attach.

[EV Compensation]
Apply exposure compensation from -3.0 to +3.0 EV in 1/3-stop increments to fine-tune your results.

[Long Exposure Display]
Results beyond 30 seconds are automatically formatted so you always know exactly how long to hold the shutter open.
- 1/8000s – 30s : Standard shutter value (e.g. 1/250)
- 30s – 60s : Seconds (e.g. 45s)
- 1 min – 1 hour : MM:SS format (e.g. 02:30)
- Over 1 hour : HH:MM:SS format (e.g. 01:30:00)

[Wide Setting Range]
- Aperture: f/1.0 – f/32 (1/3-stop steps, 31 values)
- ISO: 50 – 80,000 (1/3-stop steps, 33 values)
- Shutter speed: 1/8000s – 30s (56 values)

◆ Designed for the Field
- Dark theme: easy on the eyes in low-light shooting environments
- Wheel picker: drum-roll style selector for fast, precise input
- Haptic feedback: feel every click as you scroll through values
- Out-of-range alerts: clear Too Fast / Too Slow warnings when results exceed camera limits

Stop doing exposure math in your head. Set up your shot faster and more accurately with LumaCalc.


## Version history (last 3 releases)

### 1.1.1 — 2026-03-24

Performance improvements and stability enhancements

### 1.1.0 — 2026-03-11

- Refreshed UI for a cleaner, more intuitive experience
- Fixed an incorrect result when ND100K filter was selected

### 1.0 — 2025-02-13

No release notes.

## Apps similar to Luma Calc

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Photographer’s Companion](https://appshunter.io/ios/app/photographers-companion/id6754018456) | — | Free | Photo & Video |
| [Star Exposure Calculator](https://appshunter.io/ios/app/star-exposure-calculator/id6670283794) | — | Free | Photo & Video |
| [Blur Lens](https://appshunter.io/ios/app/blur-lens/id6478146048) | — | $1.99 | Photo & Video |
| [ND Filter Long Exposure Photo](https://appshunter.io/ios/app/nd-filter-long-exposure-photo/id6741926889) | 5.0 (1) | Free | Photo & Video |
| [Light Planner](https://appshunter.io/ios/app/light-planner/id6480509659) | — | Free | Photo & Video |
| [Stops+](https://appshunter.io/ios/app/stops/id6538719303) | 4.5 (2) | Free | Photo & Video |

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-03-25.*