Long exposure photography calculator
Changelog
20231202 - 2.1.4 - Added Harman Phoenix 200 film.
20231115 - 2.1.3 - Added Foma ORTHO 400 and Foma RETROPAN 320 Soft.
20231115 - 2.1.2 - Update for Foma FOMAPAN 100, 200, 300.
20231031 - 2.1.1 - Correction of aperture offset in certain cases.
20231016 - 2.1.0 - Option for display intermediate f-number values.
20231005 - 2.0.0 - Reconstruct the calculation to obtain more precise values.
20231005 - 2.0.0 - Display one and two-thirds intermediate values.
20230715 - 1.0.1 - Added AGFA APX films.
20220418 - 1.0.0 - Versioning implemented.
20211018 - 0.0.0 - Initial version.
About the calculator
This long exposure photography calculator allows you to find the right exposure times for different films with reciprocity, digital sensors, aperture values, shutter speeds and filters.Typically this will help you for long exposure photography with neutral density filters (ND filter) or night photography in B mode (bulb), whether you are using a digital camera (DSLR), a color or black and white film camera, or a pinhole (camera obscura).
Set your timer with the right exposure time and shoot!
To save your information for your analog frames quickly (context photograph, GPS coordinates, aperture, speed, film type, ISO, notes, etc.) and directly on your smartphone use LYFDA.
Reciprocity failure data and calculations
Reciprocity failure (Schwarzschild effect) calculated times and adjustments are based on technical data published by the film manufacturers, taking into account the limitations and deviations mentioned.The calculations included are based on either functions describing the reciprocity failure curve of a film or polynomial equations allowing the input of verified values.
Calculated times may differ slightly from the manufacturers' technical data for long exposures without significant consequences.
I use these measurements myself, having created this tool get different results very quickly with minimal manipulation or calculation.
Adding new films or filters
If you would like to add a film or filter not listed, please contact me so that I can research and complete the list.Did you like this article?
If this article has helped you progress or enlightened you on certain points, that's the goal, mission accomplished!Others might be interested too, so don't hesitate to share it :
- on social networks,
- photography forums,
- your acquaintances having the same passion or job as you,
- to other members of the photography club you belong to,
- with a link on your website,
- on other publishing platforms.
Thank you very much and good continuation to you.
Leave a message
Steve Dunlap
Elsberry, Mo.
2 months ago
I really like this program I'm wondering if you could add Lomagraphy earl gray to your list? I am just getting started in pinhole photography and that is what I'm currently working with Thanks for your help.
Bill
USA
4 months ago
Evening! The chart above is great. Is it possible to add f/200 to it? I'm working with pinhole at that aperture. Thanks!
David MK
Germany
4 months ago
Hi Denis, I am currently writing my bachelor thesis on the camera obscura and since this requires me to do a lot of artistic research I have been using your long exposure photography calculator for my pinhole converted cameras to great effect. I would like to thank you for providing this calculator as it is a huge help to me and I would also like to ask if you could include the films Agfa APX 100 and Agfa APX 400 on your list. I can't seem to find any up-to-date data sheet on these films ... Best regards, David
Kim-Phi
Orléans
6 months ago
Bonjour. Merci pour ces précieuses infos. De plus le calculateur avec les corrections d'expo dû à l'effet Schwarzschild est vraiment pratique.
Phred
Gironde
6 months ago
Merci pour toutes ces infos et aussi pour vos photos !!!
Bill
Denver Colorado
12 months ago
I like your program. Often when I am out trying to catch a picture I have no way to access the program do to no phone service. So I miss the picture or I try and guess setting. Do you think you will be making this down loadable in the near future. Thank you.
a.lachaine
Canada
13 months ago
Very good tool
Jose Hernandez
Los Ángeles
14 months ago
Hello! This is amazing! Thank you so much for having this available for the public! You’re definitely an MVP! Wanted to see if you can add the following to to the list: -lomography 400 -cinestill 800t -cinestill 50D Thank you!
Eliverto Scherer
Brazil
14 months ago
Nice work, very useful tool for all photographers
Francesco Libassi
Japan
21 months ago
Hi Denis, I just wanted to say thank you for this amazing calculator! I'm using it in the field for film photography and it's helping a lot. You should make an app! My best from Japan Francesco