Exposure Tools for Photographers

Exposure without guesswork

A well-exposed photograph starts with understanding the exposure triangle: shutter speed, aperture and ISO together determine how much light reaches the sensor. Change one, and the other two need to follow. The exposure triangle visualiser makes that relationship interactive and concrete.

ND filters and long exposures

An ND filter reduces the amount of light entering the lens without affecting colour. That makes slow shutter speeds possible in daylight: silky waterfalls, streaking clouds, glassy water surfaces. The ND filter calculator converts your base shutter speed to the correct exposure time for any filter strength from ND2 to ND1000. No maths on location.

Depth of field

How much of your scene is in focus? It depends on your aperture, focal length and subject distance. The depth of field calculator gives you the near and far focus limits, hyperfocal distance and total depth. Useful for landscape photography when you want everything sharp, and for portrait work when you want just enough background blur.

Flash calculations

A flash unit's guide number links aperture and distance. The flash calculator works out the right combination for you. Enter the distance to your subject and see which aperture matches which power setting. No surprises when you fire the flash.

Reading EXIF data

Every photograph contains EXIF metadata: camera body, lens, shutter speed, aperture, ISO, white balance, GPS coordinates. The EXIF viewer reads that information directly from the file. Review how you shot a particular image, or study other photographers' metadata as a learning exercise.

Crop factor and full frame equivalents

A 50mm lens on an APS-C camera behaves like a 75mm on full frame. The crop factor calculator converts focal lengths across all common sensor formats: full frame, APS-C, Micro Four Thirds, 1-inch and more. Relevant when switching systems or comparing field of view between cameras.