phototools
Photographer tools
Fast, private, browser-based calculators. Nothing you type leaves the page.
01
Depth of Field
Near/far focus limits, total DoF, and hyperfocal distance.
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02
Crop Factor
Equivalent focal length, field of view, and aperture across sensors.
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03
ND Filter
Long-exposure shutter times and required ND strength.
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04
Exposure Calculator
Aperture, shutter, ISO equivalence with priority modes and ND.
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05
Middle Focal Length
Find the unmarked middle focal length between two marked stops.
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06
Star Trail
Max shutter time before stars trail — 500 rule and the sharper NPF rule.
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07
Handheld Shutter
Slowest shutter you can hand-hold, from focal length and stabilization stops.
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08
Golden & Blue Hour
In development
Sunrise, sunset, golden hour and twilight times for any place and date.
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