• ND Filter Expert 1
  • ND Filter Expert 2

ND Filter Expert

The easiest and fastest way to calculate the exposure time when using neutral density filters or grey filters.

What does ND Filter Expert do?
With ND Filter Expert you can calculate the exposure time super fast and easy if you use ND Filter on your SLR camera.

You don't know how to use ND Filter?
That's not a problem. ND Filter Expert helps you get started in photography with ND Filters. The app provides comprehensive information and simple step-by-step instructions on what a Neutral Density Filter is and how to use it with your camera. In addition to the extensive tutorial, we offer you additional information and give you recommendations for suitable accessories. ND Expert offers you a complete package from start to finish for the use of ND filters.

Head calculation or writing?
Do you have all exposure times with ND Filter in your head or do you always have to write them down? That's over now. Save the calculated exposure time as a favorite and quickly access it again.

Problems measuring the exposure time?
Do you also never know when the calculated exposure time is over or do you have to have a stopwatch with you? ND Filter Expert has a built-in timer function that allows you to accurately measure times greater than three seconds. The app informs you with an alarm and vibration as soon as the timer has expired. In the settings you will find different types of tones and vibration schemes to choose from.

Can I combine filters?
Yes, of course, because ND Filter Expert gives you the ability to calculate the exposure time of up to five combined filters. For each filter you can choose from the total number of filters (ND1 - ND19) and combine them.

Is there advertising in the app?
We are a small two-man company and our apps are created entirely in our spare time. That's why we use discreet advertising banners outside the main operation to reward the work on the apps a little. We put a lot of time, energy and love into these little helpers in order to provide you with the best possible result. If you want to support us, click on the small advertising banner from time to time or choose our premium version. Thank you

All ND Filter Expert functions at a glance:
- Calculation of the time extension when using neutral density filters
- Combine up to five different ND filters for calculation
- Information about neutral density filters, use of ND filters and useful accessories.
- Timer functionality for exposure time greater than three seconds
- Favorites list for frequently used ND filter values
- Solutions to frequently asked questions about the use of neutral density filters
- Setting options for the timer
- Different vibration modes for the timer
- Alarm with tone when timer expires
- No unnecessary authorizations; minimum authorizations
- Easy to use
- Further setting options
- Attractive design
- Support for the application

If you have any questions about the app or ideas, please feel free to contact us. You can reach us at [email protected] .

Further information about ND Filter Expert can also be found at www.nd-filter-expert.dom

Note: In order to make this app available free of charge, it contains advertising.

Category : Photography

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Reviews (30)

Ton. L. Jul 25, 2019     

Just downloaded the app. Looks good and easy to use. A good improvement would be to retain the last settings instead of going back to the default if you want to try a different filter or speed. Now updated, and keeps the last settings to adjust for the next shot 🙂. Now 5 star rating 🙂

Cla. B. Aug 10, 2020     

Best free ND app I've used. Ive tried several. Easy to use and straight forward. Easy to add / remove filters for when stacking. Wish it had the option to show the time in total seconds, instead of minutes and seconds so it would align to the bulb mode.

El. C. Jul 27, 2019     

simple app but I why not allow manual input for the filter. Anyway it's a good app with timer, I do however prefer the Lee way of setting up as you can see relationships easier. Either way you can't go wrong here

Iai. L. May 21, 2019     

nicely designed but i experienced 2 problems: 1. it only goes upto nd8192 13 stops. i use a 10 stop and 6 stop filter often so of little use 2. does not beep or vibrate after time compeleted even though both are enabled on samsung s9+ please fix. 20.5.2019 - 1.2.11L update fixes both issues for me. Thanx.

And. D. May 30, 2020     

I've tried a number of filter exposure calculators and this is by far the best. Easy to use and the ability to stack filters is superb.

Dav. P. Jun 7, 2020     

As soon as I installed the app, my galaxy s9 froze. Tried several times, had to uninstall it. Only app I have ever downloaded that has done this. For all the reviews, I find it amazing how bad this app is.

Col. D. Feb 4, 2021     

Perfect. Does it superbly, configurable and easy to understand. All I needed from a filter app.

Jef. B. Jul 29, 2019     

Simple to use but not accurate. Photos considerably under exposed when using the calculated time.

Ste. T. Sep 5, 2020     

Nice, easy-to-use app. Nice feature of being able to stack ND filters for using a gradient with a solid.

Jim. B. Jul 11, 2021     

I was watching a video by Billy Kyle on PolarPro ND Filter calculator app walkthrough. This app is nothing like what he was showing. I bought this app for the Mavic Pro Zoom and was totally disappointed. I will simply take the loss.

Xia. Z. Mar 29, 2022     

Easy to use, great tool for long exposure.

Bil. T. Jul 28, 2021     

Very intuitive interface. Works. Love the integrated timer

Jef. K. Dec 12, 2021     

Ummm. Why does doubling the iso double the shutter time?

Rob. C. Aug 21, 2019     

You could include aperture setting with this app what if i want to use aperture on lets say f6.3 or f11.0 this all has tge effect of altering the time value

Ton. G. Feb 19, 2020     

More flexible than other apps that I have tried. Still learning how to use properly.

Fra. P. Dec 26, 2019     

The timer stops if I background the app and do something else with my phone.

Ric. v. Mar 29, 2020     

Simple, clear but brief explanation and instruction

Len. C. Dec 13, 2019     

Love this app. So easy to use and saves time trying to work it out in your head.

Vun. T. Aug 18, 2019     

Very usefull for long exposure photography.

Gar. F. Sep 23, 2019     

Such a good app. Saves me having to use my brain to calculate exposure.

Ale. G. Oct 9, 2020     

Ideal app to help keen photographers calculate exposures

Mis. C. Jun 16, 2020     

Ok the app works ok but the so called ND numbers ant nd they are stops

Rog. O. May 11, 2021     

I find it slightly more accurate than the Lee app. Recommended.

Ger. A. Dec 23, 2019     

Really like and give great info staying in my device

Ken. M. Aug 8, 2020     

This is an easy-to-use app for calculating exposure when using ND filters

Mar. M. Nov 12, 2021     

All the advice I need while still learning.

Fre. B. Mar 6, 2021     

As an absolute beginner even I could understand in an believe me that is no small thing Thank you 👏👏

Gra. Sep 27, 2020     

Great app does exactly what I want it to.

Mik. W. May 20, 2020     

Great app and really useful 👍

Nig. B. Mar 1, 2021     

As good as the Lee app. Whats not to like