HC-110 Helper

C-41 Helper

Reciprocity Helper

 The Reciprocity Helper

A web application for long-exposure reciprocity failure compensation

Based on available information and averaged data, the app calculates reciprocity failure related exposure time compensation for long exposures. To see when to employ this tool, please refer to the respective film´s datasheet. Most films require adjustment for exposures longer than one second. 


V.0.9 [BETA] Released on Dec 11th 2020. 



If you want to download the app for your Android or Apple smartphone, just scroll down and click on the button which will forward you to the respective app store. 

you can download the app and use it on your smartphone, too. It runs both on IOS and Android. Additionally, downloading the app will relieve traffic from this site and make it a bit faster again…


If you feel generous today, and like the app(s) provided by me here for free and wish to support further development, you can support this effort by making a small contribution via the PayPal Donate button below. I’m not doing this for the money, but I’m happy for anything, be it a cup of coffee, or a roll of film. 


Disclaimer:  This is a free tool provided for your convenience and is no guarantee to a perfect exposure. For best results, and for critical applications make tests under your conditions. This web app is in no way affiliated to or endorsed by any film manufacturer.


V.0.9 | 11.12.20 


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