8 calculators in this category
- Depth of Field CalculatorCircle of confusion by the sensor-diagonal ÷ 1500 conventionDepth of field is the zone in front of and behind your focus point that still looks acceptably sharp. It is set by four things…
- Hyperfocal Distance CalculatorCircle of confusion = sensor diagonal ÷ 1500 (classic convention)Focus a lens at its hyperfocal distance and everything from half that distance out to infinity records as acceptably sharp. It…
- Crop Factor & Equivalent Focal Length Calculator35 mm film frame (36 × 24 mm, 43.27 mm diagonal) as the reference formatCrop factor is the ratio of two sensor diagonals, and it converts any lens on any camera into the focal length that would frame…
- ND Filter Long Exposure Time CalculatorOptical density D = log₁₀(1/T); Schwarzschild reciprocity exponentA neutral density filter removes a known number of stops of light, and every stop doubles the exposure time. That is the whole…
- Print Size, DPI & Enlargement Calculator1 arcminute visual acuity (Snellen 20/20) for the viewing-distance limitPrint resolution is one division: pixels divided by inches. This calculator runs it in both directions — the largest print your…
- Camera Field of View & Subject Coverage CalculatorThin-lens (Gaussian) opticsAngle of view depends on two numbers and nothing else: the focal length of the lens and the physical size of the sensor behind…
- Astrophotography 500 Rule & NPF Shutter Calculator500 rule and NPF rule (Michaud)The stars move at about 15 arcseconds a second, so every untracked night shot is a race between collecting light and smearing…
- Timelapse Interval & Clip Length CalculatorA timelapse is governed by one identity: frames equal clip length times frame rate, and shooting time equals frames times…
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