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LongTime Exposure Calculator

By Thomas Penn

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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

Really good but missing the following

Really nice app easy to use and free it's exactly what i was looking for I seriously recommend it. However i didn't rate it five stars as its missing the following:
1. It only works with full stops, so its missing the 1/2 & 1/3 of a stop.
2. It only works by adding only 1 filter at a time, so its missing filter combinations like adding the CPL with the ND filters.

Save previous settings!

This app would be more useful if the previous settings (for filter and shutter speed) were remembered by the app. I use the same filter factor a lot, and it is inconvenient to have to have to scroll to the same settings each time.


Awesome tool for us photographers in the field! I used to carry a piece of paper with conversions written all over it for long exposures, but now it's on my phone

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

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

Customer Ratings

Current Version:
All Versions: