4 Best Long Exposure Calculator iPhone App

"This post includes affiliate links for which I may make a small commission at no extra cost to you should you make a purchase."

Download the Best Long Exposure Calculator iPhone App on the Apple Store by clicking this Button

If you are looking for the Best Long Exposure Calculator iPhone App to download for free, look no further.

Our expert panel of reviewers has tested dozens of apps and we have compiled a list of the 4 Best Long Exposure Calculator iPhone App that passed our tests.

Check out our list of the 4 Best Long Exposure Calculator iPhone App, tried and tested by our expert reviewers.

4 Best Long Exposure Calculator iPhone App

1. Exposure Calculator

Download the App on the Apple Store by clicking this Button
“Takes the guesswork out of what shutter speed to use. Ever struggled with an exposure meter or the camera’s auto exposure system and found that it just cannot seem to determine the correct shutter speed? I have and that is why this App was written. There are tables and formulae to help you to work out the shutter speed for yourself, but that’s not easy. This App takes some simple information about the lighting conditions, the f-stop of the camera and the ISO rating being used and calculates what the correct shutter speed should be. It is that simple. If you have used the pre-calculated tables before you might be suprised by the answers this App gives you but, believe me, I have implemented the formulae and the pre-calculated tables are approximations (sometimes rather wild ones). The tables do not include all f-stops, the tables do not take account the different ISO values cameras can be set to. This App does.

This App takes this information and presents it in an easy to use form. Just type in the f/stop value using the keypad, type in the ISO rating using the keypad and then select the applicable lighting conditions from the four lighting condition types: Daylight, Twilight, Night and Indoors. Each has a range of Exposure Values to select from.

The App then calculates what the effective EV value is (given the ISO rating) and so can calculate what the actual shutter speed should be. It also shows the applicable row from the standard tables for the EV.

Depending on the ISO rating being used the Exposure value selected from the list can be increased or decreased e.g. if the light is low and the EV is -3 but you are using ISO 800 then the effective Exposure value is zero (ISO 800 counts as +3 to EV) the shutter speed needs to match this value not that selected from the standard lighting condition values.

The tables only show some of f/stop values. For example the tables show f/2.0 and f/2.8 but you might have the camera set to f/2.4. Well it is possible to calculate the exact value so this is what the App does. Coupled with ISO values that do not generate exact EV numbers this value can show you the true value you should be attempting to use. An ISO of 250 adds +1.32 to the EV value. It is a log2 scale.

Now you may not be able to set you camera to the exact value given but it does give you a much better idea of the real shutter speed required rather than trying to guess from the tables (which are calculated on a logarithmic scale and are approximations).

By being able to set the ISO to 250 or 500, etc this App is can calculate the real EV value. If you set the ISO to 1000 then any EV value selected needs to have approximately 3.3 added to it to give the correct EV value. So if the selected EV is 6 then the effective EV with this ISO is actually 9.3. But there is no row for 9.3 in the standard tables and it does make a difference. If the camera is set to f/3.5 then the closest row in the table is for EV9 and f/2.8 (1/60th of a second) or f/4.0 (1/30th of a second).

So do you err towards 1/30th or 1/60th. Well this App actually calculates the exact value and this shows as 1/52nd of a second. Generally a camera cannot be set to this but it can be set to 1/50th so I would try that and then maybe 1/60th and maybe 1/40th. The calculation comes out as 1/50th because the EV is not 9 it is 9.3 and therefore with the ISO at 1000 everything must be treated as brighter and so less exposure is needed.

Being able to see the exact value to use is even more use when long exposures are needed. The standard tables get very vague for low light conditions i.e. EV -6 for f/22 is 64 minutes and for f/32 it is 128 minutes (over an hour more). So if you are using f/28 how many minutes at ISO 1250? Well the answer is 66.9 minutes which is much shorter than you might have guessed.”

2. Exposure-Calculator

Download the App on the Apple Store by clicking this Button
“Exposure Calculator is an iOS application for photographers to convert and calculate different exposure settings.

Longtime Exposures:
Exposure Calculator helps you to find the correct settings for your longtime exposures.
If your camera doesn’t have a timer for longtime exposures, just use Exposure Calculator’s built-in timer.

Shutter, Aperture, ISO:
No matter which parameters you want to use: Exposure Calculator calculates the remaining target value for you.

ND Filters:
Exposure Calculator helps you to find the correct settings when using ND filters.

Timer:
Built in timer for calculated exposure times greater than 2 seconds.

Push Notifications:
For very long exposure times, ExpoCalc can remind you with a push notification that the timer approaches the end.

Settings:
You can configure Exposure Calculator to meet the capabilities of your camera. Choose which ND filters you own and let Exposure Calculator display only those to keep the list clear. Choose between multiple color themes, dark and light mode.”

3. LExp – Long Exposure Calcs

Download the App on the Apple Store by clicking this Button
“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. Select your shooting parameters and the app will do the rest for you!

CALCULATORS:
• Sunrise, sunset and sun direction for any day at any location. Instantly see how sunrise and sunset positions change throughout the year. Civil, nautical, astronomical twilight times. Elevation and azimuth of the Sun. Shadow ratio.
• Stacking ND Filters: Need to stuck multiple ND filters? It’s really easy now.
• Graduated ND Filters: Not sure what Grad ND filter to use? Simply measure exposure for the sky and for the foreground and get the right answer.
• Moonlight/Nightscapes: Helps you get the right exposure for landscape photography under moonlight.
• Moon Photography: Calculates right exposure for the Moon under different conditions and focal length.
• Star-trails: Want to capture beautiful start trails? Get the right number of shots for stacking them later.
• Milky Way/non-moving stars: Helps you capturing beautiful Milky Way galaxy and starry sky without star trails.
• Velvia 50: Still shooting film and worries about reciprocity failure? This calculator is for you.
• Recalculate Exposure: From one set of ISO, aperture and shutter speed to a different set ISO, aperture and shutter speed.
• Aurora Borealis Photography: Calculates the right exposure for shooting Aurora Borealis/Australis.
• Shutter Speed Calculator for Solar Eclipses. Calculate shutter speed for different phases of solar eclipse with and without ND filters.

REFERENCE TABLES:
• Neutral Density ND Filters Reference Charts / Cheat Sheets
• Shooting Flowing Water Reference Charts / Cheat Sheets
• Shooting Fireworks Reference Charts / Cheat Sheets
• How to locate North and South Celestial Poles
• Useful resources and links on low-light and night photography

FEATURES:
• Built-in Timer. Some calculators have built-in timer for your convenience. It is automatically enabled when your exposure is 30 seconds or more.
• Alarm in Timer: You will be notified at 20, 10, 5 and 0 seconds when you are using countdown/timer.
• Favourite Calculator: Lock your favourite screen for quick access when you opening the application.
• Additional Info: Almost every calculator has some additional information about filters, used formulas, techniques etc. If a calculator is just a table than additional info is located below the table.

NOTES:
• Maps require data connection.
• Please ensure that Compass in the System Settings on your device is switched ON. The app will work more accurately with it.
• The Compass accuracy can be affected by magnetic or other environmental interferences.

LIMITATIONS OF LITE VERSION:
• Only reference tables, cheat sheets and useful recourses are available.
• No timers.

SUPPORT:
This application has been built by a photographer for photographers. Please don’t hesitate to contact me if you found a bug or have a suggestion.
Your feedback is very important!”

4. Long Exposure Calculator

Download the App on the Apple Store by clicking this Button
“Long Exposure Calculator is a utility that helps you determine the correct exposure time/shutter speed when using Neutral Density filters.

Features:
– Very simple to use
– Includes a countdown timer if the exposure time is 10 seconds or longer.
– Supports up to 24-stops of ND filter

iPhone, iPad, and iPod touch compatible.”