Depth of field calculatorNear and far limits of sharpness, total depth of field and hyperfocal distance for any lens, aperture and sensor.
Hyperfocal distance calculatorFocus distance that makes everything from half that distance to infinity sharp — with charts for every focal length.
Equivalent exposure calculatorChange aperture or ISO and get the shutter speed that keeps the same exposure, plus EV and lighting conditions.
ND filter calculatorShutter speed with 1–20 stop ND filters, with a built-in countdown timer for long exposures.
Golden hour calculatorGolden hour, blue hour, sunrise and sunset times for your exact location and date.
Crop factor calculatorFull-frame equivalent focal length, aperture and field of view for any sensor.
Print size calculatorHow large you can print an image at any DPI, in inches and centimetres.
NPF rule & 500 rule calculatorLongest exposure for pin-sharp stars using the NPF rule and the classic 500 rule.
Field of view calculatorHorizontal, vertical and diagonal angle of view and the scene width covered at any distance.
Time-lapse calculatorNumber of photos, clip length, speed-up and card space for a time-lapse.
Flash guide number calculatorCorrect aperture for any flash power, ISO and distance.
Aspect ratio calculatorMatching dimensions for any ratio, plus how much of a camera frame survives the crop.
Last updated October 03, 2026 · How we calculate · Sources