Advanced calculators · Pro
ND long exposure, astro star-trail limits, flash guide number, and a time-lapse planner.
What you get
- ND long exposure — base shutter + filter → the resulting exposure time.
- Astro — longest shutter before stars trail (500 / 300 rule), for your focal length and sensor.
- Hyperfocal distance — focus once and get front-to-infinity sharpness for landscapes.
- Diffraction limit — the aperture past which stopping down softens your sensor.
- Flash guide number — correct-exposure distance for any GN, aperture and ISO.
- Time-lapse planner — frames, shooting time and card space for your target clip.
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