Contact LExp - Long Exposure Calcs

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About: LExp or Long Exposure Calculators is a must-have app for any landscape
photographer who is shooting with ND filters or with long exposures or at night.
All important calculators, reference tables and cheat sheets in one place.


 
  2025-12-21

LExp Customer Service 💢

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NOTE: If the links below doesn't work for you, Please go directly to the Homepage of Ilya Genkin Photography






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3 Most reported problems 😔💔

4.7 out of 5

What were they thinking

2025-03-08

by Paulm_777

The older version of this app was simple and such a joy to use. The new version is complicated and convoluted, must have been designed by an engineer and not a user. Some features and info are nice additions, but the New interface is a downgrade in my opinion. None the less, thanks to Lee Filters for even having an app, It does make life easier.

Timer doesn't work in the background

2025-03-09

by JimW42

This would be 5 stars if the timer would work in the background. But if you switch to a different app, or the iPhone goes to sleep, the timer stops!

So you can use this app to calculate the exposure, but use the iOS Clock app (which includes stopwatch and countdown timer) to time the exposure. Works great, and you can check email or put the iPhone to sleep, and timer keeps running.

Problem with timer

2025-03-10

by Carlos San Miguel

There is a problem with the stacked flters timer, when the iPhone goes to sleep, the timer stops working, it should keep working in the background and wake the phone with the 20 sec waening.




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