Opening the iTunes Store.If iTunes doesn’t open, click the iTunes icon in your Dock or on your Windows desktop.Progress Indicator
Opening the iBooks Store.If iBooks doesn't open, click the iBooks app in your Dock.Progress Indicator

iTunes is the world's easiest way to organize and add to your digital media collection.

We are unable to find iTunes on your computer. To download the free app LongTime Exposure Calculator by Thomas Penn, get iTunes now.

Do you already have iTunes? Click I Have iTunes to open it now.

I Have iTunes Free Download

LongTime Exposure Calculator

By Thomas Penn

This app is only available on the App Store for iOS devices.


LongTime is a tool for photographer who uses neutral density filter (nd) for capturing long time exposures. Determine the exposure time without attached filter. Calculate the exposure time for your ND-filter with LongTime.

What's New in Version 1.2

bug fixing

iPhone Screenshot

iPhone Screenshot 1

Customer Reviews

Simple to use

As others have already said, this is a simple to use calculator for when you are using a Neutral Density (ND) filter on your Digital SLR Camera. Dial in the value of the filter (stops) and then set whatever your camera metered as an exposure time BEFORE you add the filter. The readout at the bottom will give you the value of exposure time when the ND filter is in place. The only thing that would make this a perfect application is if they implement a stop watch facility at the bottom of the App so you can time your exposures without exiting the App.

For those reviewers who "don't get it" or are wondering "how on earth do you get the camera to work" - you don't - this application isn't for the Camera in the Iphone or Ipod or even the Ipad, its for serious cameras... :)

Does exactly what it says it does!

This app is useful for photographers who use ND filters on their cameras. It does not allow you to take photographs! The app is very simple to use: simply select your ND filter grade, determine the exposure without the filter attached (DSLRs will tell you this if you hold the shutter button half-way) and the app will give you the required exposure with the ND filter attached. It does exactly what is says it does and for free!

Simply great!

As usual, the iPhone has come to the rescue and another piece of paper with important information on has now been disposed of before it blows away. This is such a simple yet useful and invaluable addition to the photographer's camera-bag. If you're into long exposures, don't leave home without it!

LongTime Exposure Calculator
View in iTunes
  • Free
  • Category: Photo & Video
  • Updated:
  • Version: 1.2
  • Size: 0.4 MB
  • Language: English
  • Developer:

Compatibility: Requires iOS 3.1 or later. Compatible with iPhone, iPad and iPod touch.

Customer Ratings

Current Version:
All Versions: