Calculator cluster
Studio, storage & utilities
Card capacity, handheld shutter speed, inverse-square falloff, aspect crops and pinhole diameter.
Studio, storage & utilities
Aspect Ratio Crop Calculator
Fit a target aspect ratio inside a source pixel rectangle and see the cropped size, pixels kept and how much of the file you throw away.
Studio, storage & utilities
Handheld Shutter Speed Calculator
Get the classic 1/(focal × crop) reciprocal, that time in seconds, and the slower shutter IBIS buys you in stops.
Studio, storage & utilities
Inverse Square Law Calculator
See how light intensity falls when you move a point source: ratio of (d1/d2)² and the stop change of 2 log2(d2/d1).
Studio, storage & utilities
Pinhole Diameter Calculator
Find an optimal pinhole diameter from focal length and wavelength, plus the resulting f-number and Airy disk in micrometres.
Studio, storage & utilities
SD Card Capacity Calculator
Estimate how many stills and how many minutes of video fit on a card from capacity, still file size and video bitrate. Decimal GB.
Other clusters
- Optics & depth of fieldDoF, hyperfocal distance, circle of confusion, macro DoF and diffraction limits.
- Exposure & lightEV, ND filters, exposure shift, flash guide numbers and the Sunny 16 rule.
- Sensor & focal lengthCrop factor, equivalent aperture, angle of view, field of view and print size from megapixels.
- Astrophotography500 rule, NPF, lunar eclipse and Milky Way starting exposures, and star-trail stacking time.
- Timelapse & videoTimelapse intervals, file size, shutter angle, slow motion and drone mapping overlap.