# LExp: Landscape Photography — Plan light. Nail the exposure.

> Long exposure and ND filter calculators for landscape photographers. (iPhone/iPad app by Ilya Genkin Photography.)

- Source: https://appshunter.io/ios/app/lexp-landscape-photography/id547000247 (this page in markdown: same URL + `.md`)
- Developer: [Ilya Genkin Photography](https://appshunter.io/developer/440193848)
- Category: Photo & Video, Utilities
- Price: $3.99
- Rating: 4.70/5 from 17 App Store ratings · 36 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.6 · 20 MB
- Languages: American English
- Released: 2012-08-28
- Data updated: 2026-09-15
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/lexp-landscape-photography/id547000247/reviews.md

## What is LExp?

Great landscape photographs start before you press the shutter.

LExp helps you be in the right place when the light is right - and get the exposure right when it happens.

Plan sunrise and sunset, find golden and blue hour, check photographic conditions, track the Sun, calculate long exposures, work with ND filters, photograph the Moon and night sky, plan star trails and eclipses - all from one photography toolkit built for landscape photographers.

PLAN THE LIGHT
* Magic Hours - sunrise, sunset, golden hour, blue hour, civil, nautical and astronomical twilight, moonrise, moonset and Moon phase.
* Sun Tracker - see where the Sun rises and sets for any date and location, with solar direction, elevation and azimuth.
* SkyMeter Forecast - see the photographic potential around upcoming sunrises and sunsets with a continuous 48-hour forecast, SCI ratings, cloud layers and photographer-focused conditions.

GET THE EXPOSURE RIGHT
* ND Filter Stacking - calculate the correct exposure when combining multiple ND filters.
* Graduated ND Filters - measure the difference between sky and foreground and choose the appropriate GND strength.
* Recalculate Exposure - quickly convert between ISO, aperture and shutter-speed combinations.
* Moonlight & Nightscapes - exposure guidance for landscapes photographed under moonlight.
* Moon Photography - calculate exposure for the Moon based on phase, conditions, focal length and camera settings.
* Milky Way & Still Stars - find the longest practical shutter speed while keeping stars sharp.
* Star Trails - calculate the number of frames required for the trail length you want.
* Aurora Photography - exposure guidance for photographing the Aurora Borealis and Aurora Australis.
* Solar Eclipse Photography - calculate shutter speeds for different phases of a solar eclipse.
* Lunar Eclipse Photography - exposure guidance throughout the phases of a lunar eclipse.
* Velvia 50 Reciprocity - compensate for reciprocity failure when shooting Fujifilm Velvia 50.

USEFUL TOOLS IN THE FIELD
* Built-in long-exposure timer where supported.
* Countdown alerts during long exposures.
* ND filter reference charts and cheat sheets.
* Flowing-water shutter-speed guide.
* Fireworks photography reference guide.
* Guide to locating the North and South Celestial Poles.
* Additional photography notes, formulas and shooting advice throughout the app.

BUILT FOR PHOTOGRAPHERS

LExp is designed around real landscape and night-photography workflows: fast access to the information you need, without digging through generic weather data or doing calculations in your head.

Whether you're waiting for sunrise, stacking ND filters beside a waterfall, photographing the Milky Way or preparing for an eclipse, LExp helps you spend less time calculating and more time making photographs.

SkyMeter Forecast and selected advanced features require LExp Premium.

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Privacy Policy: https://lexp.co/privacy
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Key features

- 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

## Recent user reviews (10 of 36)

All indexed reviews: https://appshunter.io/ios/app/lexp-landscape-photography/id547000247/reviews.md

### 2/5 — Version fr

*2025-03-06*

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

### 5/5 — Makes taking LE images more efficient

*2025-02-23*

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

### 2/5 — Version fr

*2024-10-17, version 3.8*

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

### 5/5 — Just bought this app

*2021-11-01*

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

### 5/5 — Highly Useful App

*2021-09-22*

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.

### 4/5 — Language setting problem

*2020-11-27, version 3.7*

Unable to set an other language except English

### 5/5 — Nature Photographer’s Adventure Guide

*2019-10-30*

Want to photograph star trails? You need to know the settings for your camera. This app is where you will find them. An intuitive interface gives you the calculations for all kinds of nature subjects such as aurora photography, and lunar imaging. Now all you need is a reliable camera, proper clothing, and a sense of adventure.

### 5/5 — Great Landscape/Night Photography App

*2018-12-29*

LExp is an exceptional photography tool that provides a series of handy calculators to optimize camera settings for a variety of landscape, nighttime and tripod-based captures.  The app is extremely easy to use and for less experienced photographers, provides well-written documentation and explanations of the features and function of each calculator.  Even though I know most of the rules covered by the app, the calculators include a number of additional elements that are camera (e.g., high-res) or condition (moon shots in clear vs. hazy conditions) specific to optimize your exposures.
Would love to see an Android version for my phone and auto-rotate for the app since I typically use my iPad on a keypad stand.

### 5/5 — Great app

*2018-10-06*

I recently invested considerable sum into the Lee filter system for my Nikon D850. This app is a perfect match, allowing me to quickly calculate proper exposure for various filter combinations. While I have yet to shoot in the field since getting all my filters, I've played with the app enough to know it will be quite handy. It also got a recent update, so its nice to know development is active.

### 5/5 — Thank you!

*2018-06-20*

Thank you so much!
The best!

Спасибо, Илья, давно хотел взять твою программу, все что то было не до того. Сейчас посмотрел твой сайт, ещё раз порадовался за нужный софт.
Спасибо!

## Frequently asked questions about LExp

### 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.

## Version history (last 5 releases)

### 4.0 — 2026-09-15

* New SkyMeter Forecast - see the photographic potential for upcoming sunrises and sunsets with a 48-hour forecast, Sky Colour Index, cloud layers and detailed conditions.
* Completely redesigned interface across LExp, with clearer results, faster inputs and improved readability.
* Calculators, reference charts and information screens have been refreshed for a more consistent experience.
* Optimized for iOS 26 and the latest iPhone displays, with additional bug fixes and improvements.

### 3.11 — 2025-12-21

• Minor bug fix

### 3.10 — 2025-06-08

• New Calculator: Magic Hours for Current Location - sunrises, sunsets, twilights, golden and blue hours, and moon phases and times.
• Support for iOS 18.5.
• Minor bug fixes.

### 3.9 — 2025-03-04

- New Calculator: Lunar Eclipse.
- Support for iOS 18.
- Minor bug fixes.

### 3.8 — 2023-12-28

- Support for the latest iOS.
- Bug fixes for Back and Done buttons.

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## More apps by Ilya Genkin Photography

- [Long Exposure Lite](https://appshunter.io/ios/app/long-exposure-lite/id933583440)

All apps by Ilya Genkin Photography: https://appshunter.io/developer/440193848

## Related topics

[star exposure calculator](https://appshunter.io/ios/topics/star-exposure-calculator) · [long exposure buddy](https://appshunter.io/ios/topics/long-exposure-buddy) · [long exposure lite](https://appshunter.io/ios/topics/long-exposure-lite) · [long exposure calculator](https://appshunter.io/ios/topics/long-exposure-calculator)

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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 2026-09-15.*