Exposure Calculator - Exposure calculator & filters

The application allows users to input one exposure value (Aperture, Shutter speed, ISO) and then compute equivalent exposures by setting two new parameters; the third is calculated automatically.

It also supports the addition of up to three ND filters, each capable of offering a reduction of up to 30 stops. This feature is particularly useful for long exposure photography, enabling the smooth blurring of water and clouds.

Additionally, the app comes equipped with a timer for exposures lasting four seconds or more.

Main features include:

 • calculations for Shutter, Aperture, or ISO

 • aperture range spanning from f1.0 to f360

 • shutter speed range from 480 seconds to 1/16,000 seconds

 • ISO range from ISO 0.4 to ISO 3.2M

 • ND filter support up to 30 stops, adjustable in 1, 1/2, or 1/3 stop increments

 • capability for stacking up to 3 ND filters

 • various ND filter modes: stop, density, and ND number

 • bulb mode allowing exposure times of up to 24 hours

 • reverse filter search functionality

 • calibration mode for ND filters

 • timer feature for exposures of 4 seconds or more, complete with an alarm

 • night mode featuring four overlay colors

 • optional compensation wheel for addressing reciprocity failure

 • ability to save an unlimited number of presets

 • no cost and free from advertisements

 • does not collect personal information from users

Note: Within the Shutter settings section, there is a switch to select the type of camera. This switch modifies how certain shutter speeds around one second are shown. Choose the option that aligns with your camera’s specifications. Exposure calculations are valid for all brands; this switch is solely for display preferences.

Exposure Mastery at Your Fingertips: A Photographer’s Essential Tool for Precision and Creative Freedom

From golden-hour landscapes to astrophotography marathons, this app has become my silent co-pilot in crafting perfectly exposed shots—no matter how complex the variables. As a photographer who thrives on long exposures and ND-filter experimentation, the ability to input one exposure parameter and instantly calculate balanced equivalents (while factoring in up to 90 stops of ND filtration!) felt like unlocking a cheat code for creative control. Whether dialing in a 20-minute bulb exposure for silky waterfalls or reverse-engineering a flawed ND filter’s true density, the app’s mathematical rigor is staggering. The interface, though packed with pro-tier tools like reciprocity compensation and filter stacking, remains refreshingly intuitive: input f/16 for a sunlit canyon, slap on three virtual ND filters totaling 18 stops, and watch it flawlessly compute a shutter speed of 128 seconds—all while the built-in timer counts down with a customizable night-mode overlay.

What truly elevates this tool is its respect for real-world quirks. The camera-specific shutter display toggle resolved my initial confusion between my Nikon and Sony bodies’ rounding differences, while the ND calibration mode salvaged a mislabeled 10-stop filter by pinpointing its actual 9.3-stop density. I’ve relied on it to plan moonlit seascapes (ISO 0.4? Yes, it goes there) and hyper-fast wildlife shots at 1/16,000s, trusting its calculations implicitly. The unlimited presets let me save configurations for recurring scenarios—aurora shoots with reciprocity tweaks, urban light trails with stacked filters—turning guesswork into repeatable precision.

Beyond technical prowess, the app’s ethos shines: no ads, no data harvesting, just pure utility. It’s the darkroom technician’s slide rule reimagined for the digital age—equally indispensable for film purists and pixel-perfect hybrid shooters. For anyone tired of juggling exposure calculators, filter math, and timer apps separately, this all-in-one toolkit isn’t just convenient—it’s revolutionary. Download it, and watch your patience for exposure guesswork dissolve faster than clouds in a 30-stop ND long exposure.