It also shows the applicable row from the standard tables for the EV.ĭepending on the ISO rating being used the Exposure value selected from the list can be increased or decreased e.g. 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. Each has a range of Exposure Values to select from. 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. This App takes this information and presents it in an easy to use form. The tables do not include all f-stops, the tables do not take account the different ISO values cameras can be set to. 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). ![]() 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. There are tables and formulae to help you to work out the shutter speed for yourself, but that's not easy. ![]() 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. Thank you very much and good continuation to you.Takes the guesswork out of what shutter speed to use. to other members of the photography club you belong to,įinally, if you feel like it, leave a message below, it's always nice to have a feedback.your acquaintances having the same passion or job as you,.Others might be interested too, so don't hesitate to share it : Did you like this article?If this article has helped you progress or enlightened you on certain points, that's the goal, mission accomplished! Adding new films or filtersIf you would like to add a film or filter not listed, please contact me so that I can research and complete the list. I use these measurements myself, having created this tool get different results very quickly with minimal manipulation or calculation. 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.Ĭalculated times may differ slightly from the manufacturers' technical data for long exposures without significant consequences. Set your timer with the right exposure time and shoot! Reciprocity failure data and calculationsReciprocity 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. 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). About the calculatorThis 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.
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