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LExp - Long Exposure Calcs

LExp - Long Exposure Calcs

Long Exposure Calculators

17 ratings
36 reviews
🔧 Utilities
📷 Photo & Video
$3.99

Details

  • Released
  • Updated
  • August 28, 2012
  • December 21, 2025

Features

Developer

Ilya Genkin Photography
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About

This app provides essential calculators, reference tables, and cheat sheets for landscape photographers. It simplifies complex calculations for long exposures, ND filters, astrophotography, and various lighting conditions. Features include a built-in timer and quick access to favorite tools.

✓Magic Hours and Moon Phase Calculator
✓Sunrise/Sunset Direction and Twilight Times
✓ND Filter Stacking and Graduated ND Calculators
✓Moonlight and Moon Photography Exposure
✓Star-trails and Milky Way Astrophotography
✓Reciprocity Failure and Exposure Recalculation
✓Built-in Timer with Alarms
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What's New in LExp

3.11

December 21, 2025

• Minor bug fix

User reviews

Most RecentHighest RatedLowest Rated

Version fr

Comment puis-je obtenir et installer la version en français ?
J’attends la réponse depuis le 17 octobre 2024 😤
Michel DurandMichel Durand

Makes taking LE images more efficient

Great app. Have been using this for years and has made my LE field process more efficient, effective and enjoyable. Thank you
SnapChatCrapTrapSnapChatCrapTrap

Version fr

Comment puis-je obtenir et installer la version en français ?
Michel DurandMichel Durand

Just bought this app

Very nicely put together with a lot of helpful tips. Hope the keep the updates coming to keep up with iOS updates
Dio99Dio99

Highly Useful App

No serious landscape photographer should go on a shoot without this app. It takes the mental gymnastics out of calculating camera adjustments necessary to achieve the best creative results using ND filters and long exposures.
esmith32esmith32
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Developer apps

Long Exposure Lite
Long Exposure Lite

by Ilya Genkin Photography

📷 Photo & Video

(1)

Free
See developer apps

FAQ

What does LExp - Long Exposure Calcs do?

LExp is a photography app designed to assist landscape photographers with long exposure and ND filter calculations. It offers a comprehensive suite of tools, including calculators for magic hours, sun direction, filter stacking, astrophotography, and more, all in one convenient place.

What are the key features of this app?

Key features include calculators for magic hours, sun direction, various ND filter scenarios, moonlight and moon photography, star-trails, and Milky Way capture. It also offers reciprocity failure calculations, exposure recalculation, and a built-in timer with alarms for exposures over 30 seconds.

How much does LExp - Long Exposure Calcs cost?

The application is a paid app, meaning there is an upfront cost to purchase and download it from the app store. There are no in-app purchases or advertisements mentioned in the provided description.

Is this app compatible with my device?

The description does not specify exact compatibility requirements. However, it notes that map features require a data connection and that compass accuracy is improved when the device's compass is enabled in system settings. It is likely designed for modern smartphones and tablets.

What are common use cases for this app?

Common use cases include calculating the correct exposure for shooting with multiple ND filters stacked together, determining the right graduated ND filter for balancing sky and foreground exposures, planning astrophotography sessions for star-trails or the Milky Way, and managing long exposures for flowing water or night scenes.